If you love both <a href="https://nameberry.com/list/317/unique-baby-names">unique baby names</a> and flower names for girls, Amaryllis might be a perfect choice for you. 

A showier flower name than Lily, but in the same botanical family, Amaryllis is not as outre as it might at first sound. It was used in Greek poetry as the appellation of pure pastoral beauties; Amaryllis is the heroine of Virgil's epic poem Ecologues, after whom the flower was named. 

Other references are characters in the George Bernard Shaw play Back to Methuselah and The Music Man. James Bond-creator Ian Fleming had a half sister named Amaryllis Marie-Louise Fleming, who was a noted British cellist.

Amaryllis

Everything ella, from Ella to Bella to Arabella, is red hot right now. Bella is one of the most, well, beautiful <a href="https://nameberry.com/search/girls-names/b">girl names starting with B</a>. It carried a hint of a nice Old World grandmotherly veneer, until it became attached to Twilight's Bella Swan. 
Bella derived as a diminutive of Isabella and other names with the suffix -bella, such as Anabella and Arabella, but has a meaning all its own: beautiful.That's because Bella is related to the word for "beautiful" in languages including Spanish, Italian, Latin, Portuguese, and Greek. Belle means "beautiful" in French.
 
If you're thinking of naming your daughter Bella, be aware that there are a lot of little girls whose proper names are Isabella, Arabella etc. who are called Bella, so you may hear the name more frequently than you'd guess judging by popularity statistics.
 In pre-Twilight literature, Bella Wilfer is the central character in Charles Dickens's Our Mutual Friend.
 Mark Ruffalo, Billy Bob Thornton, David Boreanaz and Eddie Murphy are all dads to Bellas. A strong feminist namesake is Bella Abzug. One current Bella is child star turned pop star Bella Thorne, born Annabella.
 Bella was in use as far back as the thirteenth century, then disappeared until the eighteenth when it became fashionable. 
 Today, Bella is among the <a href="https://nameberry.com/popular-names/dogs">most popular dog names</a>.

Bella

Spelled with either one 'l' or two, Calista came to the fore in 1997 when Calista Flockhart hit it big as Ally McBeal. Flockhart, who bears her mother's middle name, didn't just introduce a name, she introduced a whole sensibility. Pretty and delicate, Calista is definitely worthy of consideration, especially for parents with Greek roots. 
 In ancient myth, Calista (or Calisto)was a nymph loved by Zeus, whose jealous wife Hera turned her into a bear.

Calista

Stylish and dramatic, a la Donatella Versace. 

Donatella

A common choice in Greece, Eleni is starting to rise in the US thanks to its bouncy rhythm and trendy I ending.

Eleni

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

Hermione's costarring role in Harry Potter has made this previously ignored, once stodgy name suddenly viable. Hermione could really take off once today's children start having kids of their own. 
 In ancient Greek myth, Hermione is the daughter of Spartan King Menelaus and his wife Helen; in pre-Potter lit, the name appears in Shakespeare's The Winter's Tale and in Walter Scott's novel The Fortunes of Nigel.

Hermione

Saint's name made infamous by Philippine dictator's wife Imelda Marcos. A more positive famous bearer is the British actress Imelda Staunton, best known for playing Dolores Umbridge in the Harry Potter movies.

Imelda

Long common in Europe, the elegant and regal Juliana, also spelled with two n's, has invaded these shores, in tandem with the more classic Julia. Together with Julian, the name derives from Julius, a Roman family name. Its origin is shrouded in history, but possible roots include Latin iuvenis, meaning "youthfu"; Greek ioulos, meaning "downy-bearded"; or Jovis, a form of Jupiter, which means "sky father".

 
There were several early Saint Julianas and Queen Juliana was the long-reigning monarch of The Netherlands. Julianna Margulies has given that spelling of the name a substantial push. 

 Juliana has been on the Top 1000 since 1881.

Juliana

Kalindi is a lovely, rhythmic name refers to one of the seven sacred rivers of India. 

Kalindi

The name of the Roman goddess of the moon, Luna is derived straight from the Latin word for moon, luna. Luna may be the name most likely to surprise someone from an older generation by its Top 10 status in the US and its widespread international popularity.
Often ranked as Number 1 on Nameberry's internal charts, the strong but shimmery Luna is among the Top 100 names for baby girls in a wide range of countries around the world, from France to Italy to Germany, Scandinavia to Slovenia to Spain. It's simple, easy to spell and pronounce, and remarkably diverse.
 And it's also got deeper roots than you might imagine. It was somewhat popular in the US as a baby name around the turn of the 20th century, reaching a high of Number 403 way back in 1881.

Luna's popularity is undoubtedly influenced by the Harry Potter character Luna Lovegood and several high-profile celebrity babies, notably the oldest daughter of Chrissy Teigen and John Legend. 
 Along with its celebrity connections, Luna's popularity is partially driven by its standing as a mythological name. Luna’s divine complement is Sol, the god of the Sun. In Roman art, Luna is often depicted driving a chariot.
 
Luna makes another appearance as the endearing oddball Luna Lovegood in the Harry Potter series, who was central enough to the story to have Harry give his daughter Luna as a middle name, and as the True Blood teacher-shapeshifter character, Luna Garza. 
 
Along with Chrissy Teigen and John Legend, other celebrities who named their daughters Luna include Penelope Cruz and Javier Barden as well as Constance Marie. Joely Fisher and Ellen Pompeo have used it as a middle. Uma Thurman and Arpad Busson use Luna as the nickname they call daughter Rosalind Arusha Arkadina Altalune Florence.
 
Luna is also among the <a href="https://nameberry.com/popular-names/dogs">most popular dog names</a>.

Luna

Pleasant modernization of dated original. 

Meriel

This Greek flower and mythological choice doesn't make it into the pantheon of possibilities because of its association with narcissism. But narcissa is December's flower of the month, so Narcissa and Daffodil theoretically make perfect <a href="https://nameberry.com/list/577/names-for-december-babies">names for December babies</a>.

Narcissa

Oriana is a dashing medieval name, with a meaning similar to Aurora. At this point, though, Oriana is much more unusual than Aurora and makes a unique choice if you're searching for <a href="https://nameberry.com/list/316/baby-names-that-mean-new-beginnings?all=1">names that mean new beginnings</a> or dawn. Strong and evocative, Oriana also has an admirable literary resume. In medieval tales, she was the beloved of the knight Amadis, she appears in at least three seventeenth century plays, and there is an early Tennyson poem called The Ballad of Oriana. Oriana was also sometimes used to refer to Queen Elizabeth I. Oriana Fallaci was a feminist Italian journalist who interviewed many world leaders in the 1960s, 70s, and 80s.

Oriana

The fact that this Spanish classic, which honors the Virgin Mary, does not end in the conventional letter 'a' gives it a special sense of strength, elegance, and style, making it a worthy choice.
 The name originated in the legend of the miracle of the Virgin Mary's appearance over a marble pillar. It also is an allusion to her as a pillar of the church.
 Pilar is remembered as the valiant heroine of Hemingway's For Whom the Bell Tolls.

Pilar

Most of us had never heard this lovely Welsh name with links to the moon until we heard the 1976 smash hit Fleetwood Mac song of that name, with lyrics by Stevie Nicks. That same year it popped onto the U.S. Top 1000 at Number 593. 
 After giving his four boys extreme rebel names, director Robert Rodriguez bestowed this sweet name on his first daughter.
 According to Celtic legend, Rhiannon's birds sang more sweetly than any others; she herself was known for being forthright and witty.
 Rihanna looks similar but is unrelated.

Rhiannon

Serena, a name used since Roman times, was given fresh life by tennis star Williams, and then again with the leading character on Gossip Girl, Serena van der Woodsen. There have also been Serenas on soap operas and other shows from Bewitched to Law & Order.
 And pre-TV, there was the damsel in Edmund Spenser's The Faerie Queen and Serena Merle in Henry James's The Portrait of a Lady.

Serena

Adding a final a to Tamar lends it a more sensual Slavic tone, making it a more popular choice than the original. 

Tamara

Like Verity and Amity, this inclusive virtue name used by the colorful British literary Mitford family is ready to join its more popular peers Hope, Faith, and Grace. 
 The name was embraced by the Puritans in the seventeenth century, but was not as common as others. In literature it occurs as a servant in Thomas Hardy's A Pair of Blue Eyes.
 Unity Valkyrie Mitford supposedly inspired the character of Bellatrix Lestrange in J. K. Rowling's Harry Potter series. Unity Kincaid is a character In the Sandman series by Neil Gaiman.

Unity

The name Veronica projects a triple-threat image: at once saintly, sensuous, and strong. The name derives from Berenice, the Latin form of the Greek name Berenike "she who brings victory", with the spelling influenced by the Latin phrase vera icon "true image". Veronica was the name of the compassionate woman who wiped Jesus's face when he was on his way to Calvary and whose cloth was miraculously imprinted with his image: she is now the patron saint of photographers.
 Then there was Veronica (born Constance) Lake, the peekaboo blonde of the 1940s, and the sultry, dark-haired rival of Betty in the Archie comics. And, more recently, we've had tough teen private eye, Veronica Mars. Veronica is also the name of an herb with small, bright blue flowers.
 Veronica was in the Top 100 from 1972 to 1991, but it might not be too soon for a comeback—sans the dated nickname Ronnie, although hit CW show Riverdale, loosely based on the aforementioned Archie comics, may provide a boost.

Veronica

Rarely heard, and when it is, usually attached to a witch. Historically, though, Wanda was a legendary eighth century queen of Poland, and in literature it is the central character of Ouida's eponymous novel Wanda. A musical namesake is the great Polish harpsichordist Wanda Landowska.

Wanda

X marks the spot in names these days, usually at the middles or ends of names, but here is one that puts it squarely up front.
 This extravagant name, which, like many Greek names beginning with X, is pronounced as if it were a Z in English, is derived from the Greek word for the color yellow. A Homeric epithet of Demeter, Xanthe would be a striking choice for a blonde-haired baby girl, thanks to its "golden" meaning.

Xanthe

Yolanda conjures up visions of midcentury films like "Yolanda and the Thief," complete with gauzy veils, harem pants, and invisible navels. Iolanthe, with the first syllable pronounced the same as in Yolanda, is a softer version, but most modern parents would opt for the English Violet.

Yolanda

The sixth letter of the Greek alphabet, popularized by Welsh actress Catherine Zeta-Jones -- Zeta was her grandmother's first name.  Zeta can also refer to the letter Z, the last in the Roman alphabet, or be a spelling variation of Zita, a name with several possible origins and meanings.

Zeta

imogen_mairead's list "Imogen's ABCs" of 24 great name ideas: Amaryllis - Zeta!