redwoodfey's list "Enchantment" of 20 great name ideas: Ekaterina - Romilly!

Enchantment

Medieval beauties, enchanting cities, powerful faerie queens and naughty nymphs: these are the ones they write ballads about. Magickal names for a bewitching lady. 

This international variation was publicized by Olympic skater Ekaterina Gordeeva.

Ekaterina

Sleek, sharp, and soulful, Isolde is the German form of Iseult, the fabled lover of Tristan in the Arthurian romances. First appearing in the 12th-century, the name was fairly popular in the form of Iseult, Yseut, Yseult, and Ysolt, however, it wasn't until the 19th-century that this form began to catch on, after the composer Richard Wagner used it for his 1865 opera (and for his own daughter!)
 
Seen as a symbol of undying love, Isolde was an Irish princess who accidentally drinks a love potion and falls in love with the nephew of the king she was betrothed to. The story ends in tragedy, but with Tristan, Romeo, and Juliet all familiar choices, this connection doesn't need to hold you back.
 
The exact etymology of the name is unknown but one suggestion is that it comes from Germanic elements to mean "ice ruler" or "ice battle" giving it a strong, wintery feel. Alternatively, it may have Brythonic origins, in which case it could mean "she who is gazed upon."
 
More likely to be used in the Netherlands or in Germany than in the US, it could appeal more widely as an intriguing alternative to Isabel, Iris, Ines, and Imogene. Given to 15 American girls in a recent year, it comes with user-friendly nicknames Izzy and Sol, though Iso is the one used in Marilyn French's novel The Women's Room.
 
Variations of Isolde include Iseult, Isolt, Isoud, Isolda, Izolda, Isotta,and Yseult.

Isolde

Thora, related to Thor, is the ancient Norse thunder goddess name that's much softer and gentler than its meaning suggests. A noted bearer is actress Thora Birch. 

Thora

A mix of Yvonne and Elaine, Yvaine was first noticed in the Neil Gaiman fantasy novel and then movie Stardust, in which Claire Danes played the 'fallen star' Yvaine. This In all its forms, one of the most classic <a href="https://nameberry.com/list/472/scottish-names-for-girls">Scottish names for girls</a> is now attracting namer attention--just as that other Gaiman-inspired name, Coraline, did. Yvaine has a definite romantic, medieval charm. A small segment of namers are definitely taking notice.
 The name probably derives from the Arthurian male name Yvain, one of the Knights of the Round Table

Yvaine

Cosima, the kind of elegant and unusual name the British upper classes love to use for their daughters, is given to a handful of baby girls in the US after being chosen by two high-profile celebs in the same month; cool couple Sofia Coppola and Thomas Mars as well as supermodel Claudia Schiffer. It was used earlier by celebrity chef Nigella Lawson, while the male form, Cosimo, was given to the son of Marissa Ribisi and Beck.
 
The most famous Cosima in history had strong musical ties — Cosima Wagner was the daughter of composer Franz Liszt and the wife of composer Richard Wagner. Cosima is well used in Germany, Italy and Greece, but in the US, it was given to only ten baby girls in 2021, the same number who got the name in 2010.
 
A note on pronunciation: in Germany, Italy, and Spain, they say KO-zee-ma, like cozy ma. In the UK, they rhyme the first syllable with boss. In the US, you can do whatever you want.

Cosima

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

Since Morgan is used as--or more--frequently for girls as for boys, this feminization has fallen by the wayside. It drew some brief attention via the pop singer Morgana King. 
The similar Morgiana appears in Tales from the Thousand and One Nights.

Morgana

This spelling of Electra makes this vibrant name less electric and more kinetic.

Elektra

Heloise is an ancient name related to sleek, peppy classic Eloise. Both ultimately derive from the Germanic name Helewidis, which became Helewis in medieval England. In the twelfth century, the name was borne by the beloved of the French philosopher Pierre Abelard, who was considered to be one of the most learned women of the Middle Ages.
 
Most familiar to Americans as the author of Household Hints, Heloise is ready to reclaim its fashion status.

Heloise

With historical roots as a beautiful and intelligent ancient queen and literary ties to Hawthorne and Edith Wharton novels, this rarity could appeal to adventurous parents seeking the romantically unusual. Tina Fey used it as her daughter Alice's middle name.
 Zenobia was the intriguing third-century Queen of Palmyra who for a time ruled the eastern Roman Empire, Ethan Frome's wife Zeena was born Zenobia, and Zenobia Moodie was one of the most colorful characters in Nathaniel Hawthorne's The Blithedale Romance.
 Zenobia reached a high of Number 683 in 1909 but had dropped back out of the Top 1000 by the mid-1920s.

Zenobia

Arty and elegant, Ginevra is one of the most popular girls' names in Italy at the moment, ranking at #3 in a recent year. Ultimately from the Arthurian Guinevere, it's a relative of Jennifer, meaning "white wave, white shadow" or "white phantom".
 
Ginevra is also used as the Italian name for the city of Geneva in Switzerland, and may additionally be associated with the word ginepro meaning "juniper". As such, it ticks plenty of boxes as a historical name, a mythical name, a place name, and a nature name.
 
Despite its popularity in Italy, it remains a rare choice in the US, given to just 25 girls in a recent year, and as such, it could make an unexpected honor for a family Jennifer. Nicknames Ginny and Gigi add to its appeal.

Ginevra

Apt name for a little drama queen with a long future ahead of her. Saga is a Top 30 girls' name in Sweden.
 
Saga was the Norse goddess of poetry, storytelling, and history. She was a prophetess — able to predict events.

Saga

Vasilisa is the feminine form of Vasili, the Russian translation of Basil.

Vasilisa

Vivia, the fresh Italian version of newly popular name, streamlines and even vivifies the original.

Vivia

This unusual Greek flower and color name has gained considerable recent attention via actress Ione Skye, who is the daughter of sixties folksinger Donovan.
 Ione was one of the fifty sea nymphs — Nereids — in ancient Greek mythology.
 Parents attracted to newer I-names like Isla might want to consider the distinctive Ione. The English pronunciation usually starts with the long I, while in the Latin languages such as Italian it starts with the long E sound.

Ione

This name of a tragic figure in Greek mythology, the daughter of King Minos, sister of Ariadne and wife of Theseus, has a mysterious and intriguing appeal, and would make a dramatic choice.

 Phaedra has been a persistent theme in literature, both ancient and modern. There have been plays by Euripedes, Racine, Unamuno, and O'Neill, novels, poetry, operas and film--as recently as the 2011 Immortals starring Freida Pinto.
 One celebrity pulled a gender switch when she named her son Phaedra Bloom Forever.

Phaedra

Remember Zuzu, the adorable little girl you watch every Christmas in "It's a Wonderful Life"?  Here's a direct path to that nickname, a lot more zesty than the more familiar Susannah.

Zuzanna

Elspeth is one of those names that never quite made it out of the British Isles--particularly Scotland, but possesses a winningly childlike charm. Elspeth was used by Sir Walter Scott for several of his female characters.
 Elspeth Huxley was a prolific Kenyan-born U.K. writer, best known for the autobiographical The Flame Trees of Thika--she was connected by marriage to the illustrous Huxley family.
 A close cousin is Elsbeth, as in the recurring character Elsbeth Tascioni on The Good Wife. Embeth is a more distant relation.

Elspeth

Hildegard is an ancient name that sounds it, but it does have sweet short forms Hildie and Hilda to recommend it, as well as several illustrious historical bearers. Strong and striking, it would make a big and memorable name for a baby today, last having appeared in the US charts in the 1910s.

 The second wife of Charlemagne was named Hildegard, as was the 12th century saint Hildegard of Bingen: a writer, composer, philosopher and polymath considered the founder of scientific natural history in Germany, and also known as the "Sibyl of the Rhine" for her visionary works.

 In pop culture, Hildegard "Hildy" is a character in the 1940 film His Girl Friday, and the Hildegarde spelling belongs to a Valkyrie in the Marvel series of comics, as well as one of the magical aunts from the TV show Sabrina the Teenage Witch (nicknamed Hilda).

Hildegard

Originally a surname deriving from the Roman twin Romulus, this attractive name was introduced to the English-speaking world as a first name by painter Augustus John who used it for his son. Romilly John became Admiral of the Fleet in England. 
 A French surname from the twelfth century on, it's more recently been heard as a girls' name. Emma Thompson, for example, used Romilly as her daughter Gaia's middle name. And Romilly was used in the US last year for a dozen baby girls.
 The logical nicknames would be Romy or Milly, both very much in style.