Ada is one of the classic <a href="https://nameberry.com/">baby names</a> for girls that is suddenly super stylish again. A favorite at the end of the nineteenth century, Ada is an alternative to the over-popular Ava. Ada is also part of the trend toward simple, old-fashioned names beginning with a vowel, like Ivy and Ella.
 
Ada is derived from the German name Adelaide, which came from the ancient name Adalheidis. The root, adal, is a Germanic word meaning "noble." Ada can also be considered a variation of the biblical name Adah, pronounced AH-da, one of the first <a href="https://nameberry.com/girls-names">girls’ names</a> mentioned in the Book of Genesis. 
 
A worthy namesake is Ada Lovelace, mathematician daughter of the poet Lord Byron, who worked with Charles Babbage on the forerunners to the calculator and the computer. In his poem Childe Harold's Pilgrimage, Byron addresses her as "Ada! sole daughter of my house and heart."
 
Ada has a number of fictional references as well, appearing in Dickens's Bleak House and Nabokov's 1969 novel Ada; additional characters with the name were portrayed by Holly Hunter in The Piano and Nicole Kidman in Cold Mountain.
 
Ada returned to the Top 1000 in 2004, after being off since 1992; by contrast, Ada was a Top 100 name in the 1880s.
 
The Turkish name Ada means "island" and is unrelated — though it makes an excellent option for parents looking for a name spanning two cultures.

Agathe is a hugely popular name in contemporary France, even if it's English-speaking counterparts have not yet warmed to the usual English version, Agatha. The French pronunciation is sure to trip up non-French speakers.

Agathe

Anatole is one of the unique boys' names with an unusual-ish feel but an uncertain provenance, with a meaning related to sunrise and thus to fire. While it's Greek in origin, it is associated more closely with France. Anatole Kuragin is a dashing, roguish prince in Tolstoy's War and Peace.

 Fewer than five baby boys were named Anatole in the US last year, making it a good choice if you're looking for a truly uncommon boy's name that has a solid history.

Anatole

Andre is one of the international forms of Andrew that has been familiar in the English-speaking world for decades without any need to be overly Anglicized - though round the world, it is more likely to be written as André.

With its hint of flair, Andre has in fact been in the US Top 1000 names for boys for a century now, reaching the Top 200 in the 70s and 80s. Now, use of Andre has declined, but it is still in the Top 400 and given to more than 1060 babies each year.
 
Globally, Andre remains a popular choice in Brazil and Portugal, though it is also used in England, Mexico, Germany and France.

Andre

Angelica is by far the choicest form of the angelic names -- more delicate than Angelina, more feminine than Angel, more modern than Angela. But though Angelica is so lacy and poetic, it lags behind the bolder Angelina (probably for obvious reasons).
 Angelica was introduced to England from Italy in the seventeenth cenury, and is heard in early poetry and plays, including Romeo and Juliet. Angelica Schuyler, played by Renee Elise Goldsberry, is one of the most appealing characters in Broadway sensation Hamilton.
 Anjelica is a variant spelling, as in Anjelica Huston.

Angelica

Works better as a full name than Arnie does as a nickname. 

Arne

Angèle

Casimir, a traditional name of Polish kings, could do quite well these days as we see the rise of Caspian, Cassius, Castiel, et. al. Like Leopold and Laszlo, Casimir is strong and worth considering if you've got an adventurous streak — and bet your son will too. An alternative commonly cited meaning that modern parents might prefer is "proclaimer of peace". The traditional Polish spelling of the name is Kazimir.

Casimir

Dramatic and worldly, Cosimo was chosen by singer Beck and his wife, Marissa Ribisi, for their son. Now that Cosima has emerged as a starbaby favorite, twin brother Cosimo could join her.
 Cosimo de Medici was the first of the Medici dynasty to wield power in Florence during much of the Italian Renaissance and was noted for his patronage of the arts. An inspirational name for creative parents.

Cosimo

Though Dara was an (extremely wise) male figure in the Bible, this name feels mostly feminine to modern Americans. The Irish Gaelic version, Darragh, is well-used in contemporary times for boys.
 While Dara dropped out of the Top 1000 a couple of decades ago, it's one of those magic names that feels neither fashionable nor unfashionable. This timeless quality can be an advantage for a child over time. And Dara has the cross-cultural thing going for it as well. It's also a Slavic name, meaning "gift".
 The cousin-name Daria was featured a few seasons ago as the smart and cynical star of her own eponymous animated MTV show.

Dara

Eve, the oldest name in the Book, is now coming back into style, having the virtues of simplicity and purity, yet with more strength and resonance than other single-syllable names like Ann. British actor Clive Owen chose Eve for his daughter, as did Jessica Capshaw. 
 
While Eve is compromised by its similarity to trendy sisters Ava, Eva, Avery, Evelyn, Evie, ad infinitum, it still has them all beat with its streamlined classic style.
 The rapper born Eve Jihan Jeffers goes by the mononame Eve.
 Fictional Eves have figured prominently in the films All About Eve, Three Faces of Eve, and WALL·E, and on TV in Angel and Xena: Warrior Princess.
 Eve is the anglicized form of the Gaelic Aoife.

The dynamic personality and paintings of Mexican artist Frida Kahlo have inspired growing numbers of parents to resurrect this form of the name. It does much better in certain European countries, especially in Denmark and Norway. The Frieda and Freida spellings were more popular in the US until the middle of the 20th century.

Frida

Friederike

Friede

Georg

Pronounced with two syllables, as if spelled Ilsa, Ilse is popular in The Netherlands and may rise here with cousin Elsa.

Ilse

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

Though some might find it a bit heavy-booted, Ivan is one of the few Russian boys' names to become fully accepted into the American naming pool.
Ivan is, of course, ubiquitous in Russian culture. There is one of the brothers in The Brothers Karamazov, the protagonists of Tolstoy's The Death of Ivan Ilyich, and Solzhenitsyn's One Day in the Life of Ivan Denisovich, and the title character in Chekhov's Uncle Vanya. Real life Ivans include writer Turgnenev, biologist Pavlov, tennis player Lendl, and rulers Ivan the Great and --oops--Ivan the Terrible. Vanya is his warm and appealing nickname.

Ivan

Janusz

Jérôme

This is an alternative to Laura or Lauren made romantic by Dr Zhivago, and badass by video-game heroine Lara Croft.

 In mythology, Lara was a nymph in Ovid's Fasti known for her beauty and inability to keep secrets. As a place name, Lara is a state in Venezuela.

Lara

Sharper and steelier than Martha, but with the same underused vintage appeal.

Marta

Nell, once a nickname for Helen, Ellen, or Eleanor, is a sweet old-fashioned charmer that is fashionably used today in its own right. While Nell is perfectly in tune with contemporary vintage name style, it hasn't taken off the way some of its sisters have and so maintains an air of distinction. Use Nell or Nellie as a short for any name from Eleanor to Penelope or just name her Nell.
 Nell was the pet name FDR called his wife Eleanor (along with Babs), the famous Little Nell in Dickens' Old Curiosity Shop was Elinor, and the infamous mistress of Charles II, Nell Gwynne, was born Eleanor as well.
 Nell was the belle of the ball in the Gay Nineties, but has been off the charts since 1956. It's currently popular in France though, ranking at Number 144.
 Jodie Foster played the title character of the 1994 movie Nell, and Helena Bonham Carter and Tim Burton named their daughter Nell, keeping the family tradition of names related to Helen.

Nell

Ottomar

To the thousands of girls who screamed the name of their favorite Beatle in the 1960s, the boys' name Paul had a thrillingly unique image, but to the rest of the world, then and now, it's a name that's so simple and yet so widely diffuse that it could belong to almost anyone. Paul is an ancient <a href="https://nameberry.com/boys-names">name for boys</a> -- popular in Roman and medieval times -- that's not very fashionable now, which can work in its favor, scarcity balancing simplicity. 
 Paul also has a rich religious background: Saint Paul (originally called Saul but baptized Paul after his conversion) was a cofounder with Peter of the Christian church, and there have been six Pope Pauls.
 Paul also boasts a wide range of name-sharing heroes, from Revere to Newman, Cezanne to McCartney. Some creative foreign versions are Pablo (Spanish), Paolo (Itlaian), Pavel (Russian) and Paavo (Finnish).
 Paul's single syllable also make it one of the most popular traditional <a href="https://nameberry.com/list/673/middle-names">middle names</a>.

Paul

Philipp

Thought to be one of the ten angels who accompanies the sun on its daily course: a lovely image redolent of mythology. If you're looking for <a href="https://nameberry.com/list/316/baby-names-that-mean-new-beginnings?all=1">names that mean new beginnings</a>, this makes an unusual and evocative choice.
As an anglicized spelling of Raabi'a, it means "fourth", as in the saint and mystic Rabia of Basra.

Rabia

You've got the red-nosed reindeer to transcend, but there are other distinguished personages named Rudolph, Rudolf, and Rudy.

Rudolf

A soft and interesting Hebrew name long popular in France, where it has ranked in the Top 400 since 1986 (as Salomé). Ex-ER star Alex Kingston named her daughter Salome Violetta.

Despite seeing small but steady use during the latter part of the 19th century, Salome has never really caught on in the US – no doubt due to the historical association with the Biblical dancer who asked for John the Baptist's head on a platter. In fact, the dancer is not mentioned by name in the Bible, but the name Salome was attached to this figure by the 1st-century Romano-Jewish historian Josephus. There is, however, another Salome who is specifically mentioned in the Bible: a female follower of Jesus, wife of Zebedee and mother of the disciples James and John.

 Oscar Wilde wrote a play called Salome in 1893 and Richard Strauss based an opera on it twelve years later. In pop culture, the name was given to a seductive vampire character in the HBO series True Blood.

Salome

Old saints' and popes' name that went to France in the 1920s with the Russian Ballets Russes; in its Russian form, Sergei, it retains an artistic, almost effete air. 

Serge

Yvon

mjschuma's list "Working List of Favorites" of 31 great name ideas: Ada - Yvon!