Adelaide is now heading straight uphill on the coattails of such newly popular sisters as Ava, Ada, and Audrey, and in the company of Adeline and Amelia. It was chosen by actress Katherine Heigl for the name of her second daughter.
 Adelaide gained fame as the noble German princess who married the British King William IV in 1830 and became known as "Good Queen Adelaide," inspiring the name of the Australian city and a craze for her name. Earlier, St. Adelaide was married to Otto the Great and became Empress of the Holy Roman Empire, described as "a marvel of beauty and goodness."
 When Aussie actress Rachel Griffiths (also mother of son Banjo) chose Adelaide for her daughter, she said she'd been inspired by the city, Miss Adelaide in Guys and Dolls, and the Disney character in The Aristocats. Adelaide can also be found in works by Thomas Hardy and Agatha Christie.

Adelaide

Alys

Ayn is a nonconformist name associated with controversial Russian-born writer and philosopher Ayn Rand, (born Alisa) author of The Fountainhead, who adopted it when she moved to the US in 1926.

Bea is a former old lady name that's cute again as a short form -- and is now beginning to stand on its own. Bee is a variation that, like Bea, can work as a diminutive for any name that starts with the letter B, or in the middle. Bea actually stood alone on the popularity lists for four years at the beginning of the twentieth century--and it could happen again.
 Golden Girl Bea Arthur was born a Bernice.

Time was, even C-starting Catherines who called themselves Kate spelled it with a K, but Cate Blanchett changed all.  Cate is now as acceptable as (but not as well used as) Kate. Cait might be short for Caitlin.

Cate

With the growing popularity of Celia and Cecilia, this vintage canasta-playing nickname name could be due for a comeback.
 Ceil had a few years of recorded popularity in the first decade of the twentieth century, peaking in 1905. Today, fewer than five baby girls receive the name, meaning it doesn't even make the US extended list.
 One prominent bearer was fashion designer Ceil Chapman (born Cecilia),who was a favorite of actresses from the forties to the sixties--she was one of Marilyn Monroe's favorite designers. She also provided the trousseau for young Elizabeth Taylor's first wedding.
 Caveat: Might be misheard as Seal.

Ceil

Grey is the more common spelling in Britain and Australia. This color name has a softness and ambiguity which makes it equally lovely for a boy or a girl.

Grey

This form of Agnes, Ines has always been popular since the true story of the thwarted lovers Queen Ines of Castro and King Peter of Portugal. This has to be one of the most heartbreaking and bloody true romances in history!

Prince Peter fell in love with the beautiful and lovely Ines, but their relationship was forbidden by his father King Afonso. Peter (who had been married) became a widow and planned to marry Ines, but this too was disallowed. When Peter followed her into exile, Afonso ordered Ines to be murdered in front of her own child. Distraught, Peter hunted her murderers down and ripped the hearts out of their bodies, claiming they did not have any hearts. When he later came to the throne, Peter made Ines his queen, exhumed her body and made the court vow allegiance to her.

Ines recently achieved new prominence in the US as the name of the second daughter of actors Blake Lively and Ryan Reynolds.

Inez is the Spanish spelling.

Ines

Isla is a hit name throughout the English-speaking world but hasn't found the same popularity in other western countries, perhaps because its spelling and pronunciation don't make sense for those whose native language is not English. Think island without the final two letters.

Adding to the confusion, the name is a twin of the Spanish word for island, which is pronounced EES-la. Isla is part of a trend for simple, old-fashioned <a href="https://nameberry.com/girls-names">girls’ names</a> that start and end with a vowel: Ava, Ada, Ella, Emma, Eva, Ida, Ivy. 
 
Red-haired actress Isla Fisher, married to Sacha Baron Cohen, propelled the name to stardom. Isla Black Hitchens is a Harry Potter character; Queen Elizabeth has a great-granddaughter named Isla Elizabeth Phillips. 
Some other similar names that are not as trendy as Isla: Islay and Ailsa.

Isla

No, we don't consider Jane too plain. In fact, for a venerable and short one-syllable name, we think it packs a surprising amount of punch, as compared to the related Jean and Joan.
 A very old name, Jane has been around since Tudor times, in this country moving in and out of fashion. Jane was once so common that it became generic—as in Jane Doe and G.I. Jane—then spent a considerable time as the back end of such smooshes as Maryjane, Bettyjane, and Sarajane.
 We think it's time for a fresh look at Jane—and not only in the middle place. Just think of all the awesome Janes of the past, both real and fictive—from Austen to Addams to Eyre to Fonda. 
 Jimmy Kimmel recently named his baby girl Jane.

Jane

Originally a feminine of John, Jean was popular in Scotland long before it found favor elsewhere, and had its most shining moment here in the era of Jean Harlow (born Harlean), ultimate symbol of silver screen glamour. Now, though there are many grandmas and even moms with the name, it doesn't seem all that baby-friendly. Though that could change, and Jean could join Jane.
 A perennial on the popularity list until it finally dropped off in 1994, Jean was in the Top 20 from 1922 to 1936 and ranks among the 100 most <a href="/list/653/100-most-common-names-for-girls">common names for girls</a> of the past century. It was extremely well-used as a middle name, as in Michael Jackson's song "Billie Jean" and tennis champ Billie Jean King, not to mention Hermione Jean Granger from Harry Potter/. It was also the actual first name of Scout Finch in To Kill a Mockingbird. Maggie Smith shone in the 1969 film The Prime of Miss Jean Brodie, and nickname Jeanie was commemorated in the Stephen Foster classic song "I Dream of Jeanie with the Light Brown Hair," as well as in the early sitcom, I Dream of Jeannie.

Jean

Stuck in the shadow of the old Dolly Parton song. In spite of its dated feel, Jolene reentered the charts in 2010 and has been rising in recent years.

Jolene

Joline

Jude may be a rising boys' name, thanks to Jude Law, but it's also a new way to spin Judy or Judith as well as a name that's long been used quietly for girls as well as boys. Alexis Stewart, daughter of Martha, named her daughter Jude and Jessica Lange plays Sister Jude on American Horror Story.

Jude

Jule

This appealing multi-cultural name, pronounced KYE, is beginning to be used for girls as well as boys. Among its many derivations and meanings: "sea" in Hawaiian, "forgiveness" in Japanese, "willow tree" in Navajo, "food" in Maori, and "earth" in Scandinavian. For girls, it debuted on the US Top 1000 in 2010.

This spelling adds a little more femininity to the neutral Lee.  Leigh and sister Lee were quite popular in the 1960s and 1970s among the first cool wave of unisex names for girls, but now have vanished from the Top 1000.  The Biblical Leah is preferred.

Leigh

Mae, a sweet and springlike old-fashioned name, hadn't been on the national charts in forty years, but finally made it back in 2010. Mae is derived from May, the month name that was chosen for its connection to Maia, the Roman goddess of growth and motherhood. 
 
Mae can be used as a nickname for the names Mary and Margaret — actress Mae West was born Mary. Alternate spellings include May, Mei, and Maye. The May spelling makes it more of a month name, while Mae makes it an antique nickname name. Both can stand on their own, as seen by Hilary Duff's choice of Mae as her daughter's first name.
 Mae along with twin sister May is now one of the prettiest and most popular middle name options for girls (Eric Clapton has an Ella Mae, Greg Kinnear an Audrey Mae, Ian Ziering a Penna Mae). 
 
A Top 100 name through 1920, Mae was big in early film history — there were leading actresses named Mae Clarke, Mae Marsh, Mae Busch, and Mae Murray. Towering over them (figuratively) was Mae West, who changed the name from sweet to sophisticated. Madonna also played a character called Mae in the 1992 movie A League of Their Own.
 
Mae Jemison was the first African-American woman to travel in space. Mae Whitman is a rising young actress seen recently on Parenthood and Arrested Development.
 
It may be worth noting that Mãe is the Portuguese word for mother, so if you've got Brazilian or Portuguese relatives, it's probably best to stick to May or Mei.

All the old ae/ay <a href="https://nameberry.com/list/479/middle-names-for-girls">middle names for girls</a> are back--Kay, Fay, Mae/May, --and Rae is one of the coolest, used as such by celebrities as Mark Wahlberg and Daniel Baldwin. Even more popular in the celebrisphere is the jazzy Ray spelling: among those who used it as their daughters' middles are Bruce Willis, Dermot Mulroney, Maggie Gyllenhaal and Peter Sarsgaard, Uma Thurman and Lee Lee Sobieski. 
 But Rae is perfectly capable of standing on her own, as in Rae Dawn Chong; it was in the Top 500 in the first two decades of the twentieth century.

The sassy, steel magnolia appeal of Oscar-winning Reese (born Laura Jeanne—Reese is her mother's maiden name) Witherspoon has single-handedly propelled this formerly <a href="https://nameberry.com/boys-names">boys’ name</a> into girls' popularity.
 Reese was recently in the Top 10 Unisex names looked at on Nameberry.

Reese

There's Rhys and there's Reese (now more popular for girls) and there's Reece, and we particularly like the traditional Welsh spelling, which entered the list in 2004, possibly influenced by Jonathan Rhys Meyers, of The Tudors, and Welsh-born actor Rhys Ifans.
 Always widespread in Wales, where it has deep historic roots, Rhys is also a high-ranking name in England, Ireland and Scotland.
 Former New Kid on the Block Joey McIntyre named his son Rhys Edward in 2009.

Rhys

Less than ten percent of the babies named Rhys are girls, whereas Reese is given five times more often to girls than to boys, thanks to Ms. Witherspoon.  It's a sleek and attractive name, but one that benefits from two accepted spellings that help clarify its gender identity.

The nickname of writer Capote can also be seen as a shortened spelling of the virtuous TRUE.

alaichoy's list "Middle Names for Verona" of 23 great name ideas: Adelaide - Tru!