Amarantha is a rare botanical name whose mythical equivalent was believed to be immortal.  The Italian and Spanish form is the somewhat-more-acccessible Amaranta.

Amarantha

One of the stellar unique baby names from mythology, Andromeda was the beautiful daughter of Cassiopeia who, like her mother, literally became a star--the constellation that bears her name.The Bohemian Andromeda makes a dramatic and adventurous choice in a time when four-syllable mythological names are gradually making their way into the mainstream.
 Andromeda Tonks (nee Black), is a Harry Potter character
 Cousin name Andromache belonged to the tragic wife of the Trojan Hector, appeared in Shakespeare's Troilus and Cressida and was the subject of plays by Euripedes and Racine.

Andromeda

This name of a third-century Christian martyr has an romantic, appealing feel in the modern world. It first came to American attention via Prince's love interest in the film Purple Rain. 
 St. Apollonia of Alexandria propelled her name into great popularity in the Middle Ages; her name is invoked against toothaches.
 Apolonia, one 'l', is the name of a character in John Steinbeck's novel, The Pearl.

Apollonia

Arabella, lovely and elegant, has long been well used in Britain and finally made it onto the American list in 2005. Its meaning may also be interpreted as "beautiful," thanks to -bella.
 
Arabella was used as a given name beginning in the 12th century with the birth of Arabella de Leuchars, granddaughter of William the Lion, King of Scotland. It is derived from the Latin orabilis, from which Arabella gets its meaning. Some scholars tie Arabella to Amabel, claiming that the former developed as a variation of the latter in Scotland, much like the name Annabel. 
 
Arabella has been a great favorite in English novels, dating as far back as Samuel Richardson's Clarissa and Henry Fielding's Tom Jones, and also appeared in The Vicar of Wakefield, Dickens's Pickwick Papers, George Eliot's Felix Holt and Thomas Hardy's Jude the Obscure, and more recently in Harry Potter.
 Arabella is the title of a lyric comic opera by Richard Strauss, and was chosen for their daughters by Ivanka Trump and Dr. Oz. A real life heroine is Arabella Mansfield (born Belle Aurelia), the first American woman to become a lawyer.
 Though off its 2017 peak, Arabella is a sophisticated choice especially recommended for parents who love the super-popular Isabella but want something more distinctive.

Arabella

Araminta is an enchanting eighteenth-century invention familiar in Britain and just beginning to be discovered here. It was used in 1693 by William Congreve in his comedy The Old Bachelor, and in 1705 by the versatile Sir John Vanbrugh, architect of Blenheim Palace as well as a playwright, for his comedy The Confederacy.
 In the Enid Bagnold novel National Velvet, Araminta is the name of the central character's mother.

Araminta

This name of the Cretan goddess of fertility is most popular now as the more melodic Ariana, but Ariadne has possibilities of its own. It first entered the US Top 1000 in 2014. The renewed interest in the name falls in line with the revival of other mythological names like Apollo and Athena. The trendy nickname Ari doesn't hurt either.
 In Greek mythology, she was the daughter of Minus who gave Theseus the thread by which he escaped from the labyrinth. After being deserted by him, she married Dionysus, the god of fertility, wine and drama

Ariadne

ASPASIA

Augusta is a dignified name reminiscent of wealthy great-aunts, but with the fashion for both August and Gus for boys, Augusta could get some fresh energy. 
 Augusta was the title of honor given to the wives and daughters of Roman emperors, which then morphed into a given name, brought to England by the German princess who became the mother of George III.
 Augusta is also a saint's name and a place name. Her literary Great-Aunt image was formed via the characters Lady Augusta Bracknell in Oscar Wilde's The Importance of Being Earnest, an elderly relative in the Harry Potter books, and Aunts Augusta in both Graham Greene's Travels with My Aunt and P.G Wodehouse's Jeeves and Wooster novels. 
 Augusta has a choice of two friendlier nicknames--Aggie and Gussie.

Augusta

Aurelia is an ancient Roman name that's become a surprise hit in the contemporary world. A top favorite on Nameberry, it reentered the US Top 1000 in 2014 after a 70-year absence and continues to climb.
 
Aurelia is the female form of the Latin name Aurelius, an ancient Roman surname. Aurelius is derived from the Latin word aureus, meaning "golden," which was also the name of a gold coin used in Ancient Rome. Aurelius was a cognomen, a third name in Roman culture that often referenced a personal characteristic or trait, likely used for someone with golden hair.
 
The Roman classic Aurelius, from which Aurelia derives, was very common in the Roman Empire and is currently experiencing a resurgence in the US—it re-entered the Top 1000 list in 2012 after a 61-year hiatus. 
 
The name of several minor early saints, Aurelia's sound and feel can be credited for it being on the rise again. Aurora and Oriana are Aurelia cousins you might also want to consider. 
 
Aurelia was the name of the mothers of Julius Caesar, the writer Sylvia Plath, and Arnold Schwarzenegger, who, in her honor, made it one of his daughter Christina's <a href="https://nameberry.com/list/673/middle-names">middle names</a>.

Aurelia

Augustana

Bettina is a dainty ballerina version of Betty, that has not been heard much since its 1950s-60s heyday.  Bettina appeared in the Danielle Steele novel Loving, and in real life as one of Grace Kelly's bridesmaids. 

Bettina

Calliope is the name of the muse of epic poetry -- and also the musical instrument on the merry-go-round. Bold and creative, it would not be the easiest name for a girl lacking such qualities. It debuted in the US Top 1000 in 2016. While Americans usually pronounce this name with a long I sound and the emphasis on the second syllables, Greeks pronounce it with the emphasis on the third syllable -- ka-lee-OH-pee.


Calliope

Cassiopeia, the name of a mythological mother who became a stellar constellation, is challenging but intriguing, and has all those softening Cass nicknames available. And with all names Cass-related trending, Cassiopeia may be an unusual route to a stylish name.

With the rise of other otherworldly and mythical choices, from Apollo to Jupiter to Juno, Cassiopeia may just feel more possible for mortals now than ever before in its long history.

Some sources say the meaning relates to the cassia berry or tree, and may be "cassia juice," making this a botanical as well as a mythological name.

Cassiopeia

Cerelia is a melodic and unusual choice, perfect for a child born in April or May. Another version is Cerella.


Cerelia

Not cutting edge, but still graceful and feminine. 

Christiana

Cipriana

Clorinda is a romantic name invented by a sixteenth-century poet, but has a synthetic sound today. 

Clorinda

Cressida is a pretty mythological and Shakespearean heroine name much better known in Britain than it is here &mdash; an imbalance the adventurous baby namer might want to correct. 
 
Although the Trojan heroine named Cressida in the tale told by Boccaccio, then Chaucer, then Shakespeare, didn't have the greatest reputation &mdash; she was faithless to Troilus and broke his heart &mdash; the name today sounds fresh, crisp and creative.
 In Suzanne Collins's The Hunger Games: Mockingjay, Cressida is a film director character; Cressida Cowell is the author of the popular novel series How to Train Your Dragon.

Cressida

Cinderella stepsister type Victorian-valentine name. 

Dorinda

Eleanor is back, Nora is back, and, as predicted, Eleanora is back too, as of 2023. 
 Having left the charts in the 1930s, this elaboration of Eleanor has returned and blends the elements of its two more popular sisters into one elegant, grand, and sophisticated sounding choice. 
 
Given to nearly 300 babies in 2023, the addition of that final vowel gives Eleanor a little flip at the end, making it more Latinate and poetic, while still sounding perfectly familiar and grounded. 
 
If you love the idea of this but don't want her to become just another Nora or another Ellie, you could consider Leonor or Lenore too.

Eleanora

Eugenia, a name scarcely used at all since the 1980's, is another that flourished a century ago and could be due for a revival.
 Eugenia has some interesting literary references, including the fascinating Baroness Eugenie Munster in Henry James's The Europeans and Eugenia Alabaster, a leading character in A. S. Byatt's Angels and Insects, and it was also the birth name of Skeeter in the book and film The Help.
 The third century St. Eugenia, an early Roman Christian martyr, is remembered for disguising herself as a man to escape persecution.
 Music lovers will be familiar with the name of renowned flute virtuoso Eugenia Zukerman.

Eugenia

Eulalia is a melodious name with a southern drawl, thanks to those lilting double Ls.
 A teenage martyr, Saint Eulalia was born in Spain and is a patron saint of Barcelona, where there is a cathedral in her name. One legend associated with Eulalia is that a dove flew out of her neck when she was killed, thus the association with both sweet speech and peace.
 Eulalia is a character in William Faulkner's Absalom, Absalom; Marcia Gay Harden has a daughter named the related Eulala Grace.
 Eula is the traditional short form, but Lalia or Lally would make more appealing and modern-sounding nicknames. The French version is Eulalie (subject of a Poe poem); in Spanish it's Olalla.

Eulalia

Ancient martyr's name that, though not especially appealing, might still be mildly possible, especially for Anglophiles. It was widely used in early Scotland, but was overtaken by its nickname, Effie.

Euphemia

Fiammetta, from the Italian word for flame, has both femininity and fire. Fiammetta could make a good alternative to more conventional Italian girls' names like Giovanna. 
 Fiammetta has some romantic, if not fiery, references. It was the pseudonym of Boccaccio's beloved in the Decameron and other works (the subject of a famous Pre-Raphaelite painting by Dante Gabriel Rossetti); and another Fiammetta was a famous courtesan and lover of Cesar Borgia. Currently there is an Italian model named Fiammetta Cicogna.

Fiammetta

This yellow harbinger spring bloom was named for Scottish botanist William Forsyth, and is even more unusual than such species as Acacia and Azalea.

Forsythia

Gratiana

Like Violet, Lavender and Lilac, Ianthe is a purple flower name. Chosen by the poet Shelley for his daughter, Ianthe has a poetic, romantic, almost ethereal quality. In the ancient myth, she was the daughter of Oceanus, supreme ruler of the sea, and also a Cretan woman so beautiful that when she died the Gods made purple flowers grow around her grave.
 Iantha is also used.
 Ianthe was a favorite of the pastoral poets of the seventeenth century and then again in the early nineteenth. She appears in the works of Shelley, Barbara Pym and Georgette Heyer. Writer Richard Brautigan named his daughter Ianthe.

Ianthe

Laetitia adds a layer of ancient patina to the more prosaic LETITIA.

Laetitia

Lavinia is a charmingly prim and proper Victorian-sounding name which actually dates back to classical mythology, where it was the name of the wife of the Trojan hero Aeneas, who was considered the mother of the Roman people.
 Later literary bearers include the protagonist's daughter in Shakespeare's Titus Andronicus (which has the line "She is Lavinia, therefore must be lov'd"), the heroine of G.B. Shaw's Androcles and the Lion, and characters in David Copperfield, Henry James' Washington Square, and the contemporary The Hunger Games and Downton Abbey--and Lavinia was also used by Thackeray, T. S. Eliot, and by Ursula Le Guin for an eponymous novel.
 Trivia tidbit: Lavinia was Ava Gardner's middle name.
With its vintage nickname Vinnie, Lavinia might well appeal to parents who favor lavender-tinged names like Amelia and Matilda and Maude.

Lavinia

Its mellifluous sound makes Leonora--which has a rich history and a tie to the popular Leo names-- a keen possibility for revival. Though it's been hiding below the Top 1000 since the 1940s, Leonora is being rediscovered by stylish parents in the US and Europe.
Leonora has the distinction of being three major opera characters, including the heroines of Beethoven's Fidelio and Verdi's Il Trovatore. It was also the name of two characters played by Elizabeth Taylor--in Secret Ceremony and Reflections in a Golden Eye.
Leonora Carrington was a notorious British-born surrealist artist and writer who lived most of her life in Mexico.
Related names include Leonore, Lenora and Lenore, subject of a famous Edgar Allan Poe poem.

Leonora

Lovisa

Lucasta was invented by seventeenth century poet Richard Lovelace for a collection of poems dedicated to a lover named Lucy, and is familiar through the Eugene O'Neill play and film Anna Lucasta. Lucasta is a distinctive, rarely used choice and a logical extension of the Luke/Luc/Luca names.

Lucasta

Pretty, delicate and crystal clear, with the readymade nickname of Lucy.

Lucida

A pretty and plausible Latin name that's gotten a bad rap through the years via a link to Lucrezia Borgia, who, though long considered a demon poisoner, was actually a patron of learning and the arts.
 Lucretia is a U.S. First Lady name, borne by the wife of President James A. Garfield; a worthy namesake is Lucretia Mott, a Quaker abolitionist, and peace and women's rights advocate.
 In the Harry Potter saga, Lucretia Black Prewett is a pure-blood witch.

Lucretia

This pretty sea-born name was used to dramatic effect by Shakespeare in his play Pericles for the virtuous princess who says she is "Call'd Marina, for I was born at sea." Marina was an epithet of Venus, and there was more than one saint of that name. It was used in Britain from as early as the fourteenth century.
 Although it reached as high as Number 219 in 1994, Marina never had the trendy feel of cousins Melissa and Marissa. It's now very popular in Spain.
 A prominent current bearer is Marina Abramovic, widely publicized New York-based Serbian performance artist. And actor Matt LeBlanc chose the name for his daughter, Marina Pearl.

Marina

The short-lived magazine edited by former Vogue chief Grace Mirabella put this beautiful name off-limits for a while, but now it's perfectly fit to join the fashionable Bella pantheon. More distinctive than Isabella.

Mirabella

The name of several early saints, including one, Pelagia the Penitent, a beautiful and licentious dancing girl who repented, then, disguised as a man, spent the rest of her life living alone in a cave on the Mount of Olives. Because of her early vocation, she is the patron saint of actresses.

Pelagia

Philippa is a prime example of a boy's name adapted for girls that was common as crumpets in Cornwall, but rarely heard stateside. That was before the advent of royal sister-in-law Philippa Middleton, who goes by the lively nickname Pippa.
 Philippa has still never appeared in the Top 1000 in the US, quite an accomplishment for a classic name that's been around for centuries. It does, however, rank on England's as well as Nameberry's own internal lists.
 
Pippa doesn't rank in the US either, but is far more popular than Philippa in the rest of the English-speaking world. It ranks in the Top 100 in Ireland, Australia, and New Zealand, and in the Top 200 in England and Scotland.
 
Philippa has been fashionable in England since the fourteenth century when King Edward married Philippa of Hainault. There have been several early Saint Philippas, and it was the name of the wife of Geoffrey Chaucer.
 Novelist Philippa Gregory authored the bestselling historical novel The Other Boelyn Girl.

Philippa

Philomela, the name of a mythological Athenian princess who was transformed into a nightingale, is rarely heard outside the Greek community. The mellifluous Philomela might make a more distinctive and prettier update for Pamela or Phyllis.  Philomela may also be a good choice for a music-lover's daughter.  Try Pippa or Millie for short.

Philomela

Phyllida, a "Masterpiece Theatre"-style appellation, seems far fresher and more unusual than Phyllis. It's green-related meaning makes it one of the prime <a href="https://nameberry.com/list/316/baby-names-that-mean-new-beginnings?all=1">names that mean new beginnings</a>.
 It's a name used by sixteenth century poets and writers: Lyly has a character named Phyllida in his 1592 play Galathea, and there is a poem of the same period called Phyllida and Corydon.
 The distinguished Scottish actress Phyllida Law is the mother of actresses Emma and Sophie Thompson; Phyllida Lloyd directed such films as Mamma Mia! and The Iron Lady.

Phyllida

Whether spelled Raffaela, Rafaela, Raffaella, or Raphaela, a euphonius name with a dark-eyed, long-flowing-haired image. Like Gabriella and Isabella, is beginning to be drawn into the American mainstream.

Raffaela

A name some people first encountered in the old children's book series The Five Little Peppers, in which Sophronia, the youngest of the Peppers is nicknamed Phronsie.`It was also used by Dickens in two of his novels: The Old Curiosity Shop and Our Mutual Friend.
 An archaic option for elaborating on Sophie/Sophia.

Sophronia

This feminine form of Theodosius has long been buried deep in the attic, but might be a good discovery for the parent who wants to move beyond Theodora. Vice President Aaron Burr named a daughter Theodosia ("Dear Theodosia" is a song in the smash musical Hamilton), and it was the birth name of silent screen vamp Theda Bara. Theodosia actually appeared on the US popularity lists in the 1880s and 90s.

Theodosia

This unusual name found in Scottish poetry would make a distinctive Gaelic pick. 

Vevina

Wilhelmina was long burdened with the Old Dutch cleanser image of thick blond braids and clunky wooden clogs, but that started to be changed somewhat by the dynamic Vanessa Williams character on Ugly Betty, and even further by the choice of Wilhelmina by ace baby namers Natalie and Taylor Hanson. For the less adventurous, Willa is, for now, still a more user-friendly female equivalent of William.
 Wilhelmina was a lot more commonly heard in the U.S. at one time: it was as high as Number 215 in the 1880s, but has been off the list completely since 1955.
 Queen Wilhelmina reigned in the Netherlands for most of the early twentieth century, becoming a heroic figure during the two World Wars. The name got an infusion of glamour via Wilhelmina Cooper, the Dutch-born model who established the top Wilhelmina Model Agency in 1967. Wilhelmina "Willie" Scott was the name of the Kate Capshaw character in Indiana Jones and the Temple of Doom.
 To enliven her image, Wilhelmina has a plethora of nicknames: Mina, Minna, Minnie, Minka, Billie, and Willa.

Wilhelmina

One of the few remaining unrestored vintage gems, with a choice of two winning nicknames--the girlish Winnie and the tomboyish Freddie. Winifred, the name of a legendary Welsh saint, was a Top 200 name into the mid-1920's.
 Winifred was one of the Forsytes in The Forsyte Saga, Winifred Foster was the heroine of Tuck Everlasting, and another appeared in Joss Wheden's Angel; in Once Upon a Mattress, Princess Winnifred (two n's) sings the song 'A Girl Named Fred'. The Disney folks seem to have been fond of the name--they used it in Jungle Book, Mary Poppins and Hocus Pocus. 
 Actress Jacqueline Bisset was born a Winifred and notable Winnies include Mrs. Mandela and the young girlfriend on The Wonder Years. Formerly considered old and fusty, Winifred is back in, featured amongst the newest additions to the US Top 1000 in 2023.

Winifred

mermuse's list "Fine Ladies" of 46 great name ideas: Amarantha - Winifred!