This undiscovered unisex name has lots of flair. It was first noticed as a girl's name, starting in the 1980's, on the long-running daytime drama Search for Tomorrow, with the character Adair McCleary, who had ahead-of-their-time brothers named brothers Hogan, Cagney and Quinn. But since Adair has yet to find many takers, it would make a fresh and appealing choice.

Adair

Alfred is up off his recliner! If you're looking for a path to Fred, you can go directly to Frederick or take the long way around with the so-out-it's-in-again Alfred. Alfred is quite popular in several European countries, especially England and Wales, Norway, Sweden, and Denmark.
 Alfred the Great, King of Wessex (called "England's darling") was a wise, compassionate and scholarly king of old England in the tenth century. His name reached the height of its popularity from the late eighteenth to the early twentieth century—it was in the Top 50 in the U.S. until 1933.
 Among its best known bearers were the poet Alfred, Lord Tennyson, movie director Alfred Hitchcock, biologist/sex researcher Alfred Kinsey, Swedish inventor/industrialist Alfred Nobel, and photographer Alfred Stieglitz. And let's not forget Batman's butler, Alfred Pennyworth.
 Hipper nicknames: Alf, Alfie, and Fred.

Alfred

A pretty, dainty name for one of the little characters in the children's book series The Borrowers. It was the basis for a later Studio Ghible animated film, The Secret World of Arrietty. While the connection to Harriet is tenuous, you might want to consider Arrietty as an honorific for an ancestral Harriet, Harry, or even Henry or Henrietta.

Arrietty

Blair with a little something extra, though that's hardly needed.

Blaire

The unisex Blake, which indeed has two conflicting meanings, has a briskly efficient image when used for a girl. 
 Though in the eighties it was seen very much as a <a href="https://nameberry.com/boys-names">boys’ name</a>, epitomized by the character of Blake Carrington, the silver-haired, powerful patriarch of the TV soap Dynasty, these days it's more apt to be associated with Blake Lively, the attractive lead of the Gossip Girl series and the film Sisterhood of the Traveling Pants.

Blake

Brooke has long projected an aura of sleek sophistication, and can also be seen as a stylish water name.
 It was Brooke Shields (born Christa) who took it from quietly fashionable to ultra trendy when she was just a young girl; socialite Brooke (born Roberta Brooke) Astor gave it social status. 
 Brookes have appeared on soaps like The Bold and the Beautiful" and All My Children, and on Melrose Place and One Tree Hill.
Chynna Phillips and Billy Baldwin have a daughter named Brooke.

Brooke

Extreme makeover: Brooklyn has gone from jokey Borough Boy name in the 1990s to a leading <a href="https://nameberry.com/search/girls-names/b">girls' name starting with B</a>. The status of New York's Brooklyn as hipster heaven is ironic as few bona fide Brooklyn hipsters would choose this name.
 Brooklyn first came into widespread public view via the first Beckham boy born in 1999, though it had already entered the lower ranks of the girls' list in 1990, rising to the double digits in 2005, as more and more parents began to see it less as a NYC place name by separating it into its highly name-y syllables – brook and lyn.

Theoretically unisex, Brooklyn is now 98 percent female, while variations Brooklynn and Brooklynne are all girl.

Brooklyn

Connor, the appealing name of an early semi-legendary king of Ulster in Irish mythology, sits firmly in the Top 100 and taken together with its alternate spellings would rank even higher. In its native Ireland the Conor version is one of the highest charting <a href="https://nameberry.com/boys-names">boys’ name</a>.
 Connor MacLeod was the name of the title character in the 1986 film The Highlander, which helped promote the name.
 Nicole Kidman and Tom Cruise have a teen-aged son named Connor, while Eric Clapton has a younger Conor; the name of the Irish writer and historian is spelled Conor Cruise O'Brien.
 Since Connor means 'lover of hounds,' it might make a good choice for a dog-loving family. In fact, one of the sons in Marley and Me is given that name.

Connor

A Scottish favorite that could make it here thanks to its similarity to the word divine. It's the most popular of several feminizations of David used in Scotland, including Davida, Davinia and Davidina, which have less of a chance in the U.S. It reentered the US Top 1000 for the first time in two decades in 2016.

Davina

Evanna is the name of a Harry Potter actress who pronounces it ee-vah-na. This might be considered yet another international feminine form of the many variations of John; Ivana, Giovanna, and even Joan are cousins of Evanna.

Evanna

Finn is a name with enormous energy and charm, that of the greatest hero of Irish mythology, Finn MacCool (aka Fionn mac Cuumhaill), an intrepid warrior with mystical supernatural powers, noted as well for his wisdom and generosity. 
 Finn was chosen by cool couple Christy Turlington and Ed Burns for their son, and also by Jane Leeves and Autumn Reeser. Played by Cory Monteith prior to his death, Finn Hudson was a prominent character on Glee.
Other up-and-comers in the same family: Finlay and Finley, Finian and Finnian, Finnegan and Finnigan, and, from Germany, Fynn.

Finn

Fiona entered the American consciousness with the opening of the 1954 Broadway musical Brigadoon, but didn't come onto the U.S. popularity list until 1990.
 
Fiona is the best known of a group of related Gaelic names, which is ironic because it's the only one without genuine traditional roots — it was found first in James Macpherson's Ossianic poems and then popularized in the late nineteenth century as a feminine pseudonym for William Sharp, a Scottish male writer. <a href="https://twitter.com/HJosephineGiles/status/1555216419721297922">Some researchers believe</a> that Fiona Macleod was Sharp's identity as a trans woman.
 
Its recent spike in popularity owes much to singer Fiona Apple and also possibly to Princess Fiona in Shrek. In fact, there have been numerous Fionas on the big and small screens, from The Thorn Birds to Josie and the Pussycats, Four Weddings and a Funeral to Nurse Jackie to Shameless.
 
Jennie Garth and Chad Lowe have daughters named Fiona. It's also Julia Roberts' middle name.
 
If you're looking for something more authentic, consider Fionnuala.

Fiona

Grayson, which you might think of as a Jason-Mason substitute, has been rising through the US Top 1000 since 1984 and has ranked in the Top 100 since 2011. 

That makes Grayson a modern classic boys' name, with both a sober buttoned-up feel as well as an unconventional masculine vibe. Grayson might plausibly be a banker or an artist, and its resemblance to its female counterpart Grace gives it a feminist gloss.
 
Grayson's biggest problem, if you consider it one, is its persistent, widespread popularity. The Greyson spelling also ranks highly in the US and throughout the English-speaking world, and a wide range of alternative spellings including Gracen, Gracyn, and Greysun have sprung up for baby girls and boys.
 
Last year, about 11,000 baby boys in the US were named Grayson and Greyson alone, as many s were named William or Henry, making it a solidly Top 10 name.

Grayson

Kathleen is the early Irish import version that came between Katherine and Kaitlin, and which hasn't been used in so long it's almost beginning to sound fresh again. It was a surprise pick by one of the hip Dixie Chicks, Martie Maguire. Kathleen was a Top 10 name from 1948 to 1951, and it is the subject of several old sentimental songs, such as "I'll Take You Home Again, Kathleen."
 From the eighteenth century, Kathleen Ni Houlihan appears in Irish songs as a symbol of Ireland, representing its struggle for independence.
 Kathy Griffin and Kate Walsh were born Kathleen, and it's J.K. Rowling's adopted middle name, after her paternal grandmother. JFK's sister Kathleen was known as Kick.

Kathleen

Maeve is a short and sweet name that has become one of the most stylish Irish names for girls in the modern US. Maeve would make an excellent first or middle name choice, with more heft than Mae/May and more modern charm than Mavis. 
 Maeve appears in Irish mythology in two forms, one as the powerful Queen of Connacht, the other as the queen of the fairies. Maeve of Connacht was a warrior queen, famous for starting a war in attempt to steal her ex-husband’s stud bull. Other spellings are Meabh, Medb and Meadhbh, which are connected to mead, a honey-based wine that was produced in many ancient cultures.
 
Chris O'Donnell, Lili Taylor and Kathryn Erbe used Maeve for their daughters. The Irish author Maeve Binchy also is a well-known bearer. Maeve is the name of one of the lead characters on the HBO show Westworld.
 Irish spelling Meabh is popular in Ireland, but not recommended in the US.

Maeve

Mackenzie begat McKenna - a catchy but very trendy choice. While the Mc or Mac prefix means "son of," this is much more popular as a girl name in the US, peaking at #177 in 2002. 

Mckenna

Morgan has long been a traditional Welsh male name, a variant of the Old Welsh name Morcant, from the Welsh elements mor, meaning "sea" and cant, "circle." The female Morgan is unrelated to the male version—it is a name from Arthurian legend created for Morgan le Fay, King Arthur's half-sister and famed sorceress. Her name comes from Morgen, an Old Welsh name meaning "sea-born," and is related to the Irish name Muirgen. 
 
In this country, Morgan is now used more for girls than boys, though considerably lower than its Top 25 status in the 1990's. And although it's been veering south for both sexes, we still find Morgan a sophisticated choice. 
 
Actress Morgan Fairchild—who had an influence on the name's popularity for girls—was born Patsy.

Morgan

Niamh, derived from the Old Irish Niam, is an ancient Irish name that was originally a term for a goddess. In Irish myth, one who bore it was Niamh of the Golden Hair, daughter of the sea god, who falls in love with Finn's son Oisin and takes him to the Land of Promise, where they stayed for three hundred years. Niamh can be Anglicized as Neve, Nieve, or Neave.

Niamh is particularly popular choice in Northern Ireland, Ireland, Scotland and England and Wales. Niamh Cusack is part of the acting family that also includes Sinead (wife of Jeremy Irons), Sorcha and Padraig. Americans have recently become better acquainted with Niamh via the heroine of Christina Baker Kline's bestselling novel Orphan Train.
Here, the Anglicized Neve would undoubtedly prove simpler, if less intriguing. Actress Neve Campbell pronounces her name (a family name) "NEV", and Neve is the daughter of Conan O'Brien.

Niamh

Piper is a bright, musical name that entered the list in 1999, one year after the debut of the TV series Charmed, which featured a Piper, and it's been a consistent riser since. Piper Kerman is the memoirist whose prison experiences provided the basis for the hit Netflix series Orange is the New Black.
 Piper has been chosen by several celebs for their daughters, including Gillian Anderson and Cuba Gooding, Jr., and is now one of the top <a href="https://nameberry.com/search/girls-names/p">girls' names starting with P</a>.
 One of the first Pipers on the scene was Piper Laurie (born Rosetta), after whom actress Piper Perabo was named.

Piper

All the old ae/ay <a href="https://nameberry.com/list/479/middle-names-for-girls">middle names for girls</a> are back--Kay, Fay, Mae/May, --and Rae is one of the coolest, used as such by celebrities as Mark Wahlberg and Daniel Baldwin. Even more popular in the celebrisphere is the jazzy Ray spelling: among those who used it as their daughters' middles are Bruce Willis, Dermot Mulroney, Maggie Gyllenhaal and Peter Sarsgaard, Uma Thurman and Lee Lee Sobieski. 
 But Rae is perfectly capable of standing on her own, as in Rae Dawn Chong; it was in the Top 500 in the first two decades of the twentieth century.

A fabled storybook name via the heroine of Sir Walter Scott's novel Ivanhoe (1819), which featured a heroine called Rowena of Hargottstanstede, and also a Harry Potter name, as Rowena Ravenclaw, founder of one of the Hogwarts houses.. Rowena has some old-fashioned charm, though most modern parents seem to prefer Rowen. Pronunciation, however, is NOT like Rowen with an a at the end, but with a long e and an emphasis on the middle syllable.. She was on the popularity list until 1963, several years in the Top 500.

Rowena

Sadie started as a nickname for Sarah, but their images couldn't be more disparate. Where Sarah is serious and sweet, Sadie is full of sass and fun.
 Sadie has been soaring in popularity recently. Its last heyday was a century ago. She's been chosen by celebrities including Adam Sandler and Christina Applegate for their daughters.

 In popular culture, there's Somerset Maugham's Sadie Thompson, portrayed by Joan Crawford in Rain, Sadie Hawkins Day, where the girls get to ask the boys to dance, and songs like the Beatles' Sexy Sadie.

Sadie

Before the young Irish actress Saoirse Ronan made her mark in the films Ladybird and The Lovely Bones, few of us had heard this name, let alone known how to pronounce it. But now it is slowly way edging its way into the mainstream, particularly, of course, with parents who have Irish roots. It made its first appearance in the US Top 1000 in 2016, when it was the third-fastest-rising girls' name.
 
Saoirse originated as a baby name in 1920s Ireland as an applied use of saoirse, the Gaelic word for "freedom." The name was first adopted during the Irish War of Independence, when the Irish Republican Army fought the British Army for the liberation of Ireland from British rule. In modern times, Saoirse, as well as a host of other <a href="https://nameberry.com/list/1051/gaelic-names">Gaelic names</a>, are being revived in Ireland, the UK, and the US.
 Another related name Is Sorcha, pronounced SURK-ha and meaning "radiance": in the film Willow, the character's name is spelled Sorsha – another way to pronounce it.

Saoirse

Sean, after a long reign as one of the top <a href="https://nameberry.com/list/328/irish-baby-names-for-boys">Irish boys' names</a> in the US, has now slipped as parents look to fresher Irish choices such as Liam and Aidan. In Ireland, Sean is still highly popular, but variation Senan, an Anglicized spelling of diminutive Seanan, is also stylish in Ireland. While Sean is the Irish form of John, Seanan and Senan may be thought of either as Sean diminutives or relatives of the Latin word "senator".

Sean

Siobhan is the Irish variation of Joan, which is derived from the ancient Anglo-Norman name Jehanne. In this way Siobhan is indirectly related to the name Sinead—the Irish form of Jeannette, which also derived from Jehanne—although Sinead is not a nickname for Siobhan. Siobhan was the name of several early Irish queens and was introduced to the American public by the actress Siobhan McKenna.
 
Siobhan is a lovely Irish name which has spawned many Anglicized variations, but using the original form preserves the integrity of one of the most beautiful <a href="https://nameberry.com/baby-names/509/irish-names-for-girls">Irish girls' names</a>.
 
There have been a wide variety of fictional Siobhans, from a Detective Sergeant in the John Rebus novels to a vampire in Stephenie Meyers's Breaking Dawn to a character in J. K. Rowling's The Casual Vacancy. Most famous these days is the only daughter Siobhan in TV's Succession, appropriately nicknamed Shiv.

Siobhan

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

triana

themis_diane's list "England, Ireland, Scotland, Wales" of 28 great name ideas: Adair - triana!