This unusual form of Alexandra might be seen and pronounced as a combination of Alex and Anne.

Alexane

Amias or Amyas is a <a href="https://nameberry.com/list/317/unique-baby-names">unique name</a> with an attractive sound and feel and a lovely meaning. Though it might sound like a Biblical name, it is not, but is a surname that may be related to Amadeus or even be a male version of Amy--which would make it one of the few boys' names to be derived from a girls'.
 The Amyas version became known via the hero of the mega-popular 1855 Charles Kingsley novel, Westward Ho!, Captain Sir Amyas Leigh.

Amias

Once-obscure Spanish name inching back up into the US Top 1000 girl names after a short break. Araceli Segarra is a noted mountain climber. 

Araceli

Ethereal combination of Arden and Edith, with a sweet naturey meaning.

Ardith

Rarely heard in the US, Auberon has a gentle autumnal feel rare in a male name. Possibly starting as a pet form of Aubrey, it was also infuenced by Oberon, the king of the fairies in Shakespeare's A Midsummer Night's Dream.
 The most famous bearer of the name is British journalist and critic Auberon Waugh (whose grandfather was Aubrey and whose nickname was Bron), of the literary Waugh clan.
 The Oberon spelling is another recommended option.

Auberon

Occasionally used as an alternative to Brandon or Brennan. 

Brannon

Carabel

Wild, lovely place in western Ireland makes wild, lovely name. 

Connemara

Cyra is an unusual name that can be pronounced either SEER-a or SI-ra, rhyming with Keira or Tyra. This name may be a feminine variation of Cyrus but is also a Persian name that stands on its own.  One noted bearer is writer Cyra McFadden.

Cyra

This authentic form of the name of an Irish mythological hero with the power to make women fall instantly in love with him would work far better here as the Anglicized Dermot. 

Diarmaid

St Dwynwen is the Welsh patron saint of lovers, and her feast day on January 25 is the equivalent of Valentine's day in Wales. The short form Dwyn may be more manageable for the non-Welsh.

Dwynwen

Egan's likeness to the word eager gives this Irish surname a ready-to-please, effervescent energy, and it would make an appropriate substitute for the overused Aidan.
 This popular Irish surname originated in County Tipperary.
 Egan O'Rahilly (born Aogan O Raithaille) was the outstanding poet of his age, specializing in the vision poem, or aisling, in which he told of prophesies that Ireland would triumph over her enemies. In folklore, this Egan is depicted as a wise trickster.

Egan

A beautiful modern Cornish nature name that is rapidly picking up steam in the States: even spawning variant spellings like Elowyn and Elowynn. In its native region, it wasn't widely used as a name before the twentieth century, when the Cornish language was revived. A (currently) unique member of the fashionble El- family of names, it has a pleasant, evocative sound.

The traditional Cornish pronunciation is with stress on the middle syllable: eh-LOW-en. But most English speakers seem to pronounce it with first-syllable stress, perhaps on the example of more familiar names like Eleanor and Elodie.

Elowen

If you're looking for a Welsh name less common than Dylan, Griffin, Evan, or Morgan, you might want to consider this offbeat epithet of the wise wizard Merlin. 

Root name Ambrose is an ancient saints' name derived from the Greek ambrosia, the food and drink of the gods that conferred immortality.

Emrys

The attractive Euan and Ewan are just coming onto the U.S. radar, via actor Ewan MacGregor and Harry Potter's Euan Abercrombie.

Euan

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

Fionn, the modern Irish form of Finn, is more popular in Ireland these days than Finn, which is rising fast in the U.S. where Fionn is virtually unknown.  That's probably a good thing, because few Americans would know that Fionn and Finn have the same root and are pronounced the same, like the fin of a fish. It's the namesake of a great hero from Irish mythology, Fionn MacCumhaill, who acquired divine wisdom by eating an enchanted salmon of knowledge.

Fionn

An unusual Gwyn name with a lovely meaning, this compound name pairs Gwyn with the name Eira, meaning "snow". A relatively modern creation, it remains very rare.

Gwyneira

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

Kerensa, forever romantic, is a rare Cornish name spelled with an 's' or 'z', the most modern of the Karen family. Kerensa (or Kerenza) has ties to the Welsh Cerys.
 Kerensa is a name favored by novelists who are using a Cornish setting, such as Victoria Holt in The Legend of the Seventh Virgin.
 The Kerenza spelling has a bit more zip.

Kerensa

This Akan day name is very much associated with Kofi Annan, the seventh secretary general of the United Nations. 
The Akan people of Ghana and the Ivory Coast frequently name their children after the day of the week they were born and the order in which they were born. Most Ghanaians have a name using this system. 
 Kofi is the male name for babies born on a Friday (the female variant is Afua/Efua).

Kofi

Singer Wainwright is the third in his family to carry this unusual name. 

There's a county in Virginia called Loudoun, named for a colonial governor.

Loudon

This Slavic classic name might begin to make its mark with American parents, what with the growing popularity of the short form Mila. Borne by a tenth century saint who had been a princess from Bohemia, Ludmila is widely used in Russia, Ukraine and Bulgaria. 
 There have been many champion athletes bearing the name, some using the alternate spelling Lyudmila.
 This is a name with lots of energizing nicknames, including Lila, Lida, Lula, Luda--and Mila.

Ludmila

Mafalda is nearly unknown in the English-speaking world, despite an appearance in Harry Potter. Indeed, it does have a witchy feel.  Matilda itself is preferable, or her French form Mathilde, Spanish Matilde, or abbreviation Maud.

Mafalda

Maris is an unusual and appealing name that has never appeared in the U.S. Top 1000, overshadowed by its twentieth century elaboration, Marisa/Marissa. It derives from the phrase "Stella Maris," star of the sea, one of the many epithets of the Virgin Mary, and became familiar via the unseen (but unliked) character of sitcom Frasier's ex-sister-in-law.
 
As a surname, Maris is associated with legendary NY Yankee, Roger Maris.

Maris

Mazarine is a deep blue color also used as a first name in honor of Cardinal Mazarin, a leader of France in the 17th century.  As a first name, Mazarine is as charming as it is unusual.

Mazarine

The th sound both softens and complicates this Melanie relative. 

Melantha

The mythological Morrigan was the ancient goddess of war, often symbolized by a crow.  Besides being a name, this is also used as a proper noun preceded by an article: the Morrigan, defined as a monster in female form.  

The meaning of Morrigan has been related to both terror and greatness.  While some relate the name to Morgan of the Arthurian legends, Morrigan and Morgan are actually unrelated.

Morrigan

Intriguing Old Welsh name being revived there, but would have major pronunciation problems here. 

Myfanwy

An enchanting ancient Greek name belonging to the Greek goddess who was created from a cloud by Zeus and so became goddess of the clouds and mother of the centaurs. The name Nephele is not widely known but as among modern parents become used to Phoebe, Penelope, and Persephone, it may become one of the ancient <a href-="https://nameberry.com/list/624/gorgeous-greek-goddess-names-for-babies">Greek goddess names</a> that's back in the mix.

Nephele

Oona is a name made famous by Eugene O'Neill's daughter, who became Charlie Chaplin's wife. One of the original Oona's granddaughters was named after her, and is now an actress famous in her own right for playing Talisa of Volantis in HBO's "Game of Thrones." The double-o beginning gives their name a lot of oomph.
 In Irish legend, Una/Oona was a daughter of a king of Lochlainn. The name was very popular in Ireland in the Middle Ages, and is currently seeing a comeback--also spelled Oonagh.

Oona

Panya is a multicultural possibility with a sound that's pleasing to the English-speaking ear, though the Swahili translation, which might also be "rat," makes it less than savory as an African name.

Panya

Offbeat, under-the-radar choice to honor a Grandma Rosalie. 

Razili

No, the pronunciation--ro-SHEEN--isn't immediately obvious to the non-Gaelic viewer, but the sound of this shiny Irish version of Rose is pretty enough to make it worth considering. Very popular in its native Ireland, it's one of many <a href="Irish girl names https://nameberry.com/list/753/best-irish-girl-names">Irish girl names</a> finding a wider audience. Earlier generations Anglicized at as Rosaleen, but we stay stick to the original.
 The name has been associated with a 16th-17th century poem called Roisin Dubh (Dark Little Rose), the eponymous heroine of which is usually regarded as a personification of Ireland.
 Singer Sinead O'Connor has a daughter named Róisin.

Roisin

This pretty name found in Spanish-speaking countries shares the diminutive of Romy—also spelled Romi—with Rosemary. It joined the US Top 1000 for the first time in 2015.
 Romina Arena is an Italian-American singer-songwriter.

Romina

Roone is a lively, attractive and unusual redhead entry brought into the mix by the late TV sports and news executive Roone Arledge, who seemed to own it as a one-person name when he was alive.
 Roone can also be seen/used as a short form of Rooney.

Roone

Rupert is a charming-yet-manly name long more popular in Britain (where it's attached to a beloved cartoon bear) than in the U.S. Yet we can see Rupert as a more stylish, modern way to honor an ancestral Robert.
 Rupert has been more visible in this country of late via Rupert Grint, portrayer of Harry Potter's Ron Weasley and the character Rupert Giles, mentor of Buffy in Buffy the Vampire Slayer, as well as actors Rupert Everett and Rupert Graves--not to mention media mogul Rupert Murdoch. 
 Off the US popularity lists since the early fifties, Rupert ranks high on Nameberry--at Number 170.

Rupert

Satine, the name of the Nicole Kidman character in Moulin Rouge,, is, by definition satiny smooth. Jacinda Barrett named her daughter Satine Anais.

Satine

Silvio

Tiernan is the slightly edgier and sharper cousin of Kiernan. This is one Irish surname that is attractive but distinctive; Tierney is another, related, option. 
 Tiernan was a popular name in early and medieval Ireland and was borne by several kings and saints. It is currently high on the list in Northern Ireland.

Tiernan

Alternative form of Basil that might suit the adventurous. 

Vasili

Though to most Americans Viggo is a one-person name attached to intense actor Mortensen, it is actually an old Norse name dating back to the Vikings, and is currently the 32nd most popular appellation in Sweden. Viggo Mortensen is a Jr., sharing his name with his Danish father.
 
We think this name is so, well, vigorous, that it might appeal to others as well. Taylor and Natalie Hanson seemed to agree when they chose it for their fourth child.

Viggo

An occasionally heard African name, hobbled by a zoolike sound. 

Zuelia

LadyVanRaven's list "Unusual but Usable" of 43 great name ideas: Alexane - Zuelia!