Alexa was a steadily popular modern classic until Amazon's virtual assistant Alexa was released in 2013. It remains relatively well used in the US despite this, though its standing keeps dropping for obvious reasons. Too bad, because it's a strong and pretty name (which is probably why Amazon used it.)

Alexa

Widely used here since the fifties, Allison -- a derivative of Alice -- has now been once again surpassed by the original Alice as parents embrace vintage revivals. Despite this, Allison's popularity has slipped only slightly. 

Allison's status is challenged by up-and-coming "-son" names, from Addison to Emerson. The freshest Allison alternative may be Ellison, which adds the appeal of trendy nickname Ellie as opposed to falling nickname Allie.

Allison

Anna has become the dominant form of the Ann family, offering a touch of the international to English speakers and a bit more style than the oversimplified Ann or Anne.
 Anna is the Latin form of Hannah, a Hebrew name that derived from root chanan, meaning "grace." European Christians embraced the name for its associations with the Virgin Mary’s mother, Saint Anna — known in English as Saint Anne.
Anna has been used for generations throughout Europe, from Russia to Italy, Spain to The Netherlands. While Hannah and Anna are the most common forms of the name, variations including Annie, Annalise, Anya, Anika, Nancy, and Anais also rank in the US Top 1000.
 
Classic and simple, Anna would be an excellent choice for parents in search of a name that will bridge two different cultures, say Jewish and Italian.
 
In literature, Anna is associated with Tolstoy's Anna Karenina. The name was given some fresh life when it was used for the adorable younger sister voiced by Kristen Bell in the animated film Frozen. Three current bearers are actresses Anna Kendrick, Anna Friel, and Anna Paquin.
 
Anya takes it more into international territory, and Anja, even further. Read more about Anna and other <a href="https://nameberry.com/blog/disney-princess-names">Disney Princess Names</a> in our featured blog.

Anna

The smooth, attractive Ariana is on the rise along with the fame of pop princess Ariana Grande. Also famous is twin spelling Arianna, which is associated with Greek-born online presence Arianna Huffington. Both Ariana and Arianna are widely used names and are equally acceptable spellings.

Ariana

Bailey -- a jaunty surname -- was first used for a female TV character in 1978 in the show WKRP in Cincinnaati, then caught on big time. Bailey's still an appealing choice, though, and a celebrity fave. Parents of daughters named Bailey include Scot Baio and Stella McCartney.

Bailey

Bianca, the livelier Italian and Shakespearean version of Blanche, has been chosen by many American parents since the 1990s, just as Blanca is a favorite in the Spanish-speaking community. Its meaning of white relates to snow, making it one of the prime <a href="https://nameberry.com/list/89/winter-baby-names">names for winter babies</a>.
 Miss Bianca was an elegant mouse (voiced by Eva Gabor) in Disney's 1977 The Rescuers, and Bianca features as a character in two Shakespeare plays, Othello and The Taming of the Shrew, not to mention its musical offshoot, Kiss Me Kate.
 Bianca was brought to prominence here by the first Mrs. Mick Jagger. Her name entered the U.S. popularity ranks in 1973, reaching a high of Number 84 in 1990. Bianca was chosen for her daughter by actress Tia Carrere.

Bianca

This abbreviated spelling, which also relates to Whitney, quickly took on a life of its own, thanks to the megafame of Britney Spears, but it's already beginning to burn out. 

Britney

Extreme makeover: Brooklyn has gone from jokey Borough Boy name in the 1990s to a leading <a href="https://nameberry.com/search/girls-names/b">girls' name starting with B</a>. The status of New York's Brooklyn as hipster heaven is ironic as few bona fide Brooklyn hipsters would choose this name.
 Brooklyn first came into widespread public view via the first Beckham boy born in 1999, though it had already entered the lower ranks of the girls' list in 1990, rising to the double digits in 2005, as more and more parents began to see it less as a NYC place name by separating it into its highly name-y syllables – brook and lyn.

Theoretically unisex, Brooklyn is now 98 percent female, while variations Brooklynn and Brooklynne are all girl.

Brooklyn

Caroline is a perennial classic, one of the elite group of girls' names that's ALWAYS ranked among the Top 1000 and that's been in the Top 100 since 1994. Elegant yet strong, Caroline calls to mind the Kennedy Camelot years and Princess Caroline of Monaco.
 Caroline went to England in 1705 with King George II's wife, the German Queen Caroline of Ansbach, and then George IV married another German Caroline in 1795. 
 
In the US, Caroline has been a First Lady name via President Benjamin Harrison and was the name of one of the famous First Daughters, Caroline Kennedy. 
 
Jane Austen named one of her less pleasant characters in Pride and Prejudice Caroline, and the name was also borne by Lady Caroline Lamb, the mistress of the poet Lord Byron, as well as the mother of the Little House on the Prairie brood.
 The song "Sweet Caroline" was a huge soft-rock hit for Neil Diamond in 1969, inspired by then-eleven-year-old Caroline Kennedy (for whom he sang it at her fiftieth birthday party).
 Carolina is the more feminine (and place name) version, as opposed to the newer form Carolyn, which forces the pronunciation of the final syllable to rhyme with win and spin. Though Caroline can be pronounced that way, it's more usually pronounced to rhyme with wine and fine.

Caroline

The name of the tragic mythological Trojan princess who was given the gift of prophecy by Apollo, but was condemned never to be believed, Cassandra has been used for striking characters in movies and soap operas. Ethereal and delicate, Cassandra was in the Top 70 throughout the 1990s but is now descending in popularity. 
 
Cassandra was the name of Jane Austen's mother, sister, and two cousins. Cassandra Wilkins is a character in John Dos Passon's novel Manhattan Transfer, but in the 2007 Woody Allen thriller, Cassandra's Dream, Cassandra was not the name of a person, but a sailboat. Currently, Cassandra Wilson is a noted jazz singer; Charlie Sheen has a daughter Cassandra born in the eighties.
 
Nicknames include Cass, Cassa, Cassie, Sandra, Sandy.

Cassandra

Christine was the dominant feminine variation of Christopher forty or fifty years ago, when French E-endings were preferred over As; it was a Top 20 name for several years, from 1966 to 1974. But though it still hangs in on the popularity list, today most any other version would be considered more stylish, from Kristen to Kirsten to Christina herself.
 Christine is the heroine of the 1910 novel and hit musical Phantom of the Opera and the automotive protagonist of Stephen King's 1983 horror novel. Christine has been serenaded in song by everyone from Elton John to Kiss to Motorhead.

Christine

Claire, luminous, simple, and strong, is one of those special names that is familiar yet distinctive, feminine but not frilly, combining historical depth with a modern edge. And though Claire is enjoying revived popularity, it will never be seen as trendy. Claire is also a great middle name choice. 
 Claire is the French form of Clara, a feminine derivation of the Latin masculine name Clarus. The French word for "clear," Claire’s meaning, is clair, and was traditionally a male name. Now the spelling is used mainly for girls, along with Clare, and occasionally Klaire or Klare.
 
Claire is usually seen as the French spelling of the name, while the equally appropriate Clare is English and Clair is French too. Clara, once seen as a stuffier version, has lately gained some fashion edge, primarily because it has more vintage charm and is somewhat more unusual. The Italian Chiara is another recommended choice.
 
Famous women named Claire include the medieval Saint Clare of Assisi (who was made the patron saint of television in 1958 because of her reputed power to see events at a distance), writer Clare Booth Luce, silent screen siren Clara Bow, and actresses Claire Bloom and Claire Danes.
 
There have been countless fictional Claires as well, including ideal mom Clair Huxtable, Molly Ringwald's character in The Breakfast Club, Clare Kendry in Nella Larsen's novel Passing, and characters in House of Cards, Lost, Six Feet Under, Modern Family, and the Outlander series.

Claire

One of the flower names, used occasionally in Britain (where it's pronounced DAY-lee-a). It seems to have recovered from what was perceived as a slightly affected la-di-dah air. The flower was named in honor of the pioneering Swedish botanist Andreas Dahl, which means dale.
 In the Victorian language of flowers, Dahlia denotes elegance and dignity.
 In P.G. Wodehouse's Jeeves stories, Dahlia is Bertie Wooster's more sympathetic aunt, described as being constructed along the lines of Mae West. Reporter Dahlia Lithwick covers legal matters for the online magazine Slate.

Dahlia

Daisy, fresh, wholesome, and energetic, is one of the flower names that burst back into bloom after a century's hibernation. Originally a nickname for Margaret (the French Marguerite is the word for the flower), Daisy comes from the phrase "day's eye," because it opens its petals at daybreak.

 Daisy has a colorful literary and pop culture history – as the innocent Daisy Miller in the Henry James novella, as Daisy Buchanan, the hero's object of desire in The Great Gatsby, and as many movie and TV characters, including in L'il Abner and The Dukes of Hazzard, as the older Daisy in Driving Miss..., as well as Julia Roberts's character in her breakthrough movie, Mystic Pizza.

 Meg Ryan has a daughter named Daisy True, chef Jamie Oliver has Daisy Boo, and Katy Perry and Orlando Bloom recently named their daughter Daisy Dove.

Daisy

Demetria is a dramatic ancient Greek earth goddess possibility with the star-studded nickname Demi. Young actor/singer/songwriter Demi Lovato was born Demetria, but contrary to common hearsay, Demi Moore was born Demi.
An even more unusual cousin name is the Cornish Demelza, made somewhat familiar via the TV series Poldark.
 You may be surprised to know that Demetria was on the Top 1000 list from 1964 to 1993, reaching as high as 479 in 1974.

Demetria

Diana, the tragic British princess, inspired many fashions, but strangely, not one for her name. For us, Diana is a gorgeous and still-underused choice.
 Diana is the Latin name for the Roman goddess associated with the moon, virginity, and hunting; she is the protector of wild animals, represented in myth as both beautiful and chaste.
 Two of her most prominent bearers today are singers Diana (born Diane) Ross and Krall. Fictional Dianas appear in All's Well That Ends Well, Jane Eyre, and Anne of Green Gables.
 Now that the Duke and Duchess of Cambridge have named their daughter Charlotte Elizabeth Diana, perhaps this name will finally attract more attention and greater use.

Diana

Ella is a sweet, simple name that owes much of its current popularity to the popularity of other names, from Emma to Bella to Emily to Ellie.

Ella is one of those names that just misses ranking among the US Top 1000 for its entire history, falling off the list for a handful of years in the 1980s before shooting straight back toward the top. Like many names from Liam to Finn to Emma that's easy to spell and pronounce, Ella is an international favorite, making the Top 100 throughout the Anglophone world as well as in a range of French and German-speaking, Scandinavian, and Eastern European countries. 

Which makes sense for a name with parallel derivations in several different languages and cultures. Ella is the Norman variation of the Germanic Alia—itself a nickname for names containing the element ali. In English speaking countries and Scandinavia, Ella developed as a diminutive for names beginning with El-, such as Eleanor and Elizabeth. Ella is also a Hebrew name, referring to a tree in the pistachio family or in modern Hebrew, "goddess."

Ella can also be a short form of names that begin with El, such as Eleanor and Elizabeth, as well as those that end with -ella, from Gabriella to Luella to Rafaella. And it can be one of the many routes to the super-popular nickname Ellie.

Ella has long been a favorite celebrity baby name, chosen by several stars for their now-mostly-grown daughters by John Travolta, Warren Beatty, Ben Stiller, Eric Clapton, Jeff Gordon, Ioan Gruffudd, Alex Rodriguez, and Mark Wahlberg.
 
Iconic singer Ella Fitzgerald adds a jazzy edge. And Ella Enchanted gave the name some princess-y pop.

Ella

Emily may have dropped somewhat in the current standings, but it was the most popular <a href="https://nameberry.com/girls-names">girls' name</a> for over a decade because it appeals on many levels: Emily is feminine, classic, simple, pretty, and strong. Emily is Number 1 among <a href="https://nameberry.com/blog/gen-z-names">Gen Z names</a>. It also has those nice literary namesakes, like Emily Dickinson and Emily Brontë.
 
Parents who a decade ago might have chosen Emily have moved on to Emma and now are looking at such alternatives as Amelia and Emmeline. But those girls' names, like Emma, may soon feel overused too.
 
Emily was derived from the Roman name Aemilia, which may have evolved from the Latin word aemulus, meaning "hardworking" or "rival." Emilia has the same Latin root as Emily, but Amelia has separate origins — it was derived from the Germanic name Amalia, meaning work. Emma is also rooted in German and means universal.
 
Modern Emilys in the spotlight include a number of the hottest young actresses — Emily Blunt, Emily Mortimer, Emily Deschanel — and even Emma Stone was christened Emily. And Emily is still one of the most widely used <a href="https://nameberry.com/search/girls-names/e">girl names starting with E</a>, on its way to overtaking A as the most fashionable first initial.

Emily

Esmé comes from the past participle of the Old French verb esmer, meaing "to esteem" or "to love." It can also be considered a derivative of the Spanish name Esmeralda, which means "emerald". 

 Esmé began life as a masculine name, as in its original bearer, Esmé Stewart,1st Duke of Lennox, and Esmée, with the same pronunciation, was the feminine form. Today both spellings are used as feminine given names, along with Anglicizations including Esmay and Esmae.

 
Esmé is a sweet, sophisticated and charming literary name, from J. D. Salinger's classic 1950 story For Esmé, With Love and Squalor. Esme is also one of the most stylish <a href="/list/434/Baby-Names-That-Mean-Love">baby names that mean love.</a>

 A current favorite among celebs, including Samantha Morton, Michael J. Fox and Katey Sagal, Esme got a lot of publicity via the character Esme Cullen, the vampire matriarch of the Olympic Coven in the Twilight Saga. Esme has long been more popular across the pond in the UK, where it currently makes the Top 50 baby girl names.

 The final accent indicates the pronunciation of ez-may, though in English you can just spell it Esme. Whatever the spelling, Esme is one of the fastest-rising <a href="https://nameberry.com/search/girls-names/e">girl names starting with E</a>.

Esme

After decades of disuse, soft and feminine Evelyn has returned to the baby name stage in a huge way. It reached the Top 10 for the first time in 2017. Evelyn has now surpassed its former heights, joining a legion of contemporary little Evas, Avas, Eves, Evies, and Evelines. 
 
Evelyn derives from the French feminine given name Aveline, which is from an obscure Germanic root which may mean "desired, wished for" or "water, island". The name Aveline was brought over to England by the Normans, but it first became popular as a masculine name – a transferred use of the surname Evelyn, which comes from the same source. Variations include Evaline, Evalyn, Evelin, and Eveline.
 
Formerly a predominantly masculine name, its most famous bearer is writer Evelyn (EEV-lin) Waugh. (Trivia note: Evelyn Waugh was married to a woman named Evelyn, and they were known as 'He-velyn" and "She-velyn'.) Its quiet persona was reversed with the character Evelyn Salt, played by Angelina Jolie. Bruce Willis chose it for his fifth daughter and Carey Mulligan used it for hers.

Evelyn

Faith is one of the most straightforward of the virtue names popularized by the Puritans in the seventeenth century, many parents still choosing it as an indicator of their religious conviction. Faith peaked in 2002 at Number 48.
 Nicole Kidman and Keith Urban are the parents of a daughter they called Faith, little sister for Sunday -- a sibset suitable for a minister's brood. A prominent adult bearer is country singer Faith Hill.

Faith

Felicity is as accessible a virtue name as Hope and Faith, but much more feminine -- and dare we say, happier. The hit TV show did a lot to soften and modernize the once buttoned-up image of Felicity, and it got further notice as the red-haired Colonial doll, Felicity Merriman, in the American Girl series. A current bearer is actress Felicity Huffman.
 Two nicknames for Felicity: Flick and Fee. Other forms include Felicia and Felice.

Felicity

Fia may be most notable at this moment as the Anglicized version of the Irish Fiadh, one of the fastest-rising names in the Republic of Ireland. The meaning of Fia or Fiadh is sometimes given as "deer" but that's in the sense of a wild deer, as the name relates to the ancient word for wild. 

In Portuguese, Fia means weaver, and Fia may also be a short form of the Italian or Spanish Sofia or Fiammetta or any other fia-related name.

Whatever its origin and meaning, Fia is a light and pleasant alternative to the mega-popular Mia.

Fiona entered the American consciousness with the opening of the 1954 Broadway musical Brigadoon, but didn't come onto the U.S. popularity list until 1990.
 
Fiona is the best known of a group of related Gaelic names, which is ironic because it's the only one without genuine traditional roots — it was found first in James Macpherson's Ossianic poems and then popularized in the late nineteenth century as a feminine pseudonym for William Sharp, a Scottish male writer. <a href="https://twitter.com/HJosephineGiles/status/1555216419721297922">Some researchers believe</a> that Fiona Macleod was Sharp's identity as a trans woman.
 
Its recent spike in popularity owes much to singer Fiona Apple and also possibly to Princess Fiona in Shrek. In fact, there have been numerous Fionas on the big and small screens, from The Thorn Birds to Josie and the Pussycats, Four Weddings and a Funeral to Nurse Jackie to Shameless.
 
Jennie Garth and Chad Lowe have daughters named Fiona. It's also Julia Roberts' middle name.
 
If you're looking for something more authentic, consider Fionnuala.

Fiona

Gabriella is the feminine form of Gabriel, a name derived from the Hebrew Gavri’el. Gavri’el is composed of the elements gever, meaning "strong," and ’el, referring to God. Gabriella is used among a variety of cultures in the US, including Italian Americans, Latinos, and in the Jewish community. Gabriela is the Spanish spelling.
 
Gabriella has been on the U.S. Top 1000 list since 1984, entering the Top 100 in 2000, while the single 'l' spelling rank is also somewhat popular. It also riding on a wave of popularity in Canada and Australia.
 Gabriella was a major character on High School Musical, and real life namesakes include poet Gabriela Mistral and tennis champ Gabriela Sabatini. The French version is Gabrielle.

Gabriella

Genevieve is derived from the Germanic medieval name Genovefa, or Kenowefa, which consists of the elements kuni, meaning "kin", and wefa, meaning "woman." The medieval saint Genevieve, patroness of Paris, defended the city against Attila the Hun through her rational thinking, courage and prayer. 
 
Genevieve is a perfect choice for anyone who wants to retain the gen sound but is tired of all the overused Jen names. It is both dainty and substantial and can be pronounced either GEN-uh-veev or the French zhahn-vee-EV. 
 
Genevieve is undergoing a real revival—it's currently enjoying its highest popularity ranking since the 1930s.

Genevieve

The Italian Gianna undoubtedly owes much of its popularity in the US to its status as an honor name for John. Before the importation of Gianna, there was no truly workable feminine form of John, so Gianna found widespread favor among American parents with Italian roots and far beyond.
 
Gianna originated as the feminine form of Gianni, the Italian form of Johnny, a diminutive for Giovanni or John. The root name among these is the Hebrew name Yochanen, meaning "God is gracious." The Italian long form of Gianna is Giovanna, and common nicknames include Gia and Gigi.
 
This Italian classic entered the U.S. list in 1989, breaking into the Top 100 in 2006. Also on the U.S. list are Giovanna, Giana and short-form Gia, which was used by Matt Damon and Mario Lopez.

Gianna

Grace, a simple and pure virtue name which originally referred to divine grace, is a fashionable classic. In the early 2000s, it seemed headed for the Top 10 but pulled back from the upward trajectory, which you may consider a very good thing.

Grace is one of the most luminous of names, recalling the cool elegance of Grace Kelly, Princess of Monaco. Embraced by Americans of the Victorian era, it was the eleventh most popular name in this country in 1875 and has always ranked among the Top 1000 girl names.

Currently, Grace is the Number 1 girls’ name in Ireland, and ranks highly in other English-speaking countries. In the US, it’s one of the most popular one-syllable middle names for girls.
 
Grace is derived from gratia, the Latin word for "grace." It existed as Gracia in the Middle Ages but was not in common use until the Puritans adopted it along with other Christian attribute names in the sixteenth century. It was used as a <a href="https://nameberry.com/list/373/virtue-names">virtue name</a>, in reference to divine grace — the love and kindness of God.
 
If Grace is too overused for you, consider an international variation like Engracia or Graziella. Some parents have even migrated into the gender neutral camp in search of Grace equivalents such as Gray or Grayson or even Gracelyn. Choosing the nickname Gracie for the birth certificate is a popular option.

Grace

There are no less than ten different variations of Hailey on the current Most Popular list, but this is the spelling that brought it into the Top 10 of 2010, although it has recently dipped a bit in popularity. So, although Hailey has a shiny, unpretentious charm, its mass popularity makes it very much of the moment. Look for the Hailee spelling to rise via Hailee Steinfeld, the young actress Oscar-nominated for her performance in True Grit.

Hailey

Hannah is one of the nation's top biblical girls' names—it surpassed Sarah in 1998, and ranks in the Top 50 along with Elizabeth, Abigail, Chloe, and Naomi. Hannah is a name with many sources of appeal: Old Testament roots, soft and gentle sound, and a homey yet aristocratic image.
 Hannah originated as a variation of the Hebrew name Channah, derived from the word channan, meaning "grace." In the Old Testament, Hannah is the mother of Samuel. 
 
Names including Anne, Anna, Nancy, Anya, Annika, and Annabel are all related to Hannah. Alternate spellings such as Hana, Hanna, and Chana are also used.
 The TV show Hannah Montana was a huge TV teen sensation from 2006 to 2011, and more recently was the name Lena Dunham chose for her own character in her hit series Girls. Hannah Baker is a central character on the Netflix show 13 Reasons Why.
 Hannah is also a name that in its varied versions, which include Hana and Hanna, has roots in many cultures, from Hebrew to Arabic, European to Asian. All in all, Hannah is still a wonderful if widely used name.

Hannah

You might think of Harper as the hottest name of the last decade, jumping from obscurity to the Top 10, where it remained until last year.
 
Victoria and David Beckham's choice of Harper for their youngest child and only daughter in 2011 did much to catapult the name to stardom. Some reports say Harper was named after a character on Disney's Wizards of Waverly Place, her brother's favorite show, while other say she was named after Harper Lee, author of To Kill A Mockingbird, her mom's favorite book.
 
Those two influences definitely helped propel Harper up the popularity list in general. Plus Harper is a member of the trendy group of occupational surnames turned first names for both genders, including Taylor, Parker, Mason, and Skylar.
 
Harper has been a shooting star in the celebrisphere, chosen first by Ali Wentworth and George Stephanopoulis, followed by Lisa Marie Presley, David Spade, Dave Grohl, Martie Maguire, Tiffani Thiessen, Bill Hader and Neil Patrick Harris. Singer Paul Simon used it for his son more than 50 years ago.
 
While Harper was used near-exclusively for boys in the 1800s and remains technically unisex, in reality it's used today overwhelmingly for girls. More than 8000 baby girls were named Harper in the US last year, versus only 138 baby boys.

Harper

Hazel has a pleasantly hazy, brownish-green-eyed, old-fashioned image that more and more parents are choosing to share. Former Old Lady name Hazel reentered the popularity lists in 1998 and now is near the top of the charts.
 
Hazel is a name that comes from the English word hazel, referring to the hazelnut tree. The word was derived from the Old English hæsel of the same meaning. Historically, a wand of hazel symbolized protection and authority.
 
When Julia Roberts named one of her twins Hazel in 2004, there was a great public outcry against "another one of those nutty celebrity names", though we saw it as the deserved revival of a lovely vintage name with roots in nature. Hazel was one of the botanicals that were all the rage at the turn of the twentieth century, when it was in the Top 25, then fell out of favor, off the list completely from 1976 to 1998.
 
Other celebrities with daughters named Hazel include Emily Blunt & John Krasinski, and Taylor Neisen & Liev Schreiber.
 
Hazel Motes is the protagonist of Flannery O'Connor's 1952 novel Wise Blood, and In The Hunger Games, one of the characters is the variant Hazelle. But the most influential Hazel of recent years is the heartrending heroine of Fault in Our Stars.

Hazel

Euphonious and long stylish in England, India was one of the fastest-rising names on the 2013 list, after jumping 240 spots back into the Top 1000.
 
Gorgeous as it may be, the usage of India as a name has distinctly imperial roots, making it a loaded (and ill-advised) choice for someone without Indian heritage.
 
India was a character in Gone with the Wind, the sister of Ashley Wilkes, and more recently was picked for the daughters of singer Sarah McLachlan, actress Heather Thomas, and Avenger Chris Hemsworth.
 
India Hicks is a high-profile ex-model with ties to the royal family, and the mother of a girl called Domino. Singer India.Arie was born India Arie — without the period.

India

Serene Irene, the name of the Greek goddess of peace and one of the most familiar <a href-="https://nameberry.com/list/624/gorgeous-greek-goddess-names-for-babies">Greek goddess names</a>, was hugely popular in ancient Rome and again in the United States a hundred years ago.
 One of the most <a href="https://nameberry.com/popular-names">popular names</a> of the Roman Empire and the name of several early saints, this originally Greek name (then spelled Eirene) represented a daughter of Zeus who was the goddess of peace. Often pronounced with three syllables, it spread throughout Europe in a range of variations and is a royal name in Greece, Denmark, and the Netherlands. 
 Much of Irene's popularity in England stemmed from the character Irene Forsyte in Galsworthy's The Forsyte Saga (pronounced eye-reen-ee). Americans identified it with the sparkling Irene Dunne of Hollywood's Golden Age. Irene was a Top 20 name from 1915 to 1925, remaining in the Top 100 until 1945. It still highly popular in Spain.
 Some other references include the eponymous early smash hit Broadway musical, famed ballroom dancer Irene Castle (portrayed on film by Ginger Rogers), the Hollywood costume designer known simply as Irene, the Uma Thurman character in Gattaca, Irene Denholm the Harry Potter student at Hogwarts School, and the lullaby-ready song Goodnight, Irene.

Irene

Iris has so much going for it. It's a fashionable flower name. It's a mythological name, from the Greek goddess of the rainbow. And it's a classic name, always ranking in the girls' Top 1000 but now at its highest point ever.
 
Iris is directly derived from the Greek word iris, meaning "rainbow." In Greek mythology, rainbow goddess Iris was a messenger for Zeus and Hera who rode the rainbow as a multicolored bridge from heaven to earth. 
 The botanical iris also carries evocative symbols. In ancient times, the Iris was considered a symbol of power and majesty, the three petal segments representing faith, wisdom and valor. This image led to the naming of the colored part of the eye.
In the contemporary world, Iris has amazing international versatility, ranking highly throughout the English-speaking world as well as in a diverse range of countries from Spain to Slovenia, France to Sweden.
 Part of Iris's rise is due to its celebrity power: Jude Law and Sadie Frost, Judd Apatow and Leslie Mann, and Renee O'Connor all chose Iris for their daughters.
 A notable modern bearer was the prolific British novelist Iris Murdoch. Frequently seen on screen, characters called Iris have been played by Jodie Foster, Jane Fonda and Kate Winslet, and Iris Chase is the narrator in the Margaret Atwood novel The Blind Assassin.

Iris

Isabelle is the French variation of Isabel, which emerged in the Middle ages as an Occitan form of Elizabeth. Medieval queens Isabella of Angoulême and Isabella of France helped popularize the name in the United Kingdom. Isobel is the Scottish version, Isabella the Italian, and Izabel is used in Brazil.
 
Isabelle and all her beautiful sisters have risen quickly through the ranks over the past decade or so to dominate their mother name, Elizabeth. Isabelle's a name about which everything is lovely, except how many other little Isabelles you'll meet.
 Jeff Bridges has a grown daughter named Isabelle, while more recently Kerry Washington used it for her daughter.

Isabelle

Maevetbrennan's list "Same Letter Twin Names (girls)" of 36 great name ideas: Alexa - Isabelle!

Same Letter Twin Names (girls)

4 girls names for each letter that you can mix and match to kind your perfect pair! (So far the names go up to I)