One of the most evenly divided unisex names these days; strong and energetic, if overused, for both genders. 

Alex

Nickname name that seemed cool in the Ricki/Terri generation. However, it may be experiencing somewhat of a resurgence, evidenced by its first ever appearance in the US Top 1000 in 2015. This surprise entry into the popularity charts is almost certainly due to Andi Dorfman, the star of 2014's season of The Bachelorette.

Andi

One of the most usable of the pleasant, newly adopted nature/water names (like Lake and Ocean), especially in middle position. 
 There was a character named Bay Kennish on the show Switched at Birth; conservative political commentator Bay Buchanan was born Angela Marie.
 Other associations with bay are the bay laurel tree, prized since ancient times for its medicinal and culinary (bay leaves!) properties, and the reddish-brown color usually applied to horses.

Although the single-named singer is male, this might be a girl's nickname name or a sleek nature name that's perfect in the middle.

Beck

This tiny but punchy name has multiple origins. It stands strong alone, but could be short for numerous names including Bonnie and Bodhi.
In Mandarin Chinese, Bo means "wave".

Ties to the unfortunate Mama are now unraveling, leaving Cass or Cassie to stand on its own as a fresher sounding Cathy or Kate.  But with so many lovely long forms, we'd advise keeping this as a nickname.

Cass

Charlie is one of the friendly, tomboyish male nickname names--another is Sam-- now used almost as frequently for girls: in 2015, it ranked higher on the girls list than on the boys list for the first time. That makes Charlie one of the most <a href="https://nameberry.com/unisex-names">popular unisex names</a> around today. The name Charlie, for females, has been jumping up the charts since it reappeared, after a 50-year hibernation, in 2005. Charlie has been a favorite for starbaby girls, including the twin daughter of Rebecca Romijn and Jerry O'Connell and the daughter of Julie Chen and Les Moonves. Jeremy Sisto has a hyphenated Charlie-Ballerina. And as Charlotte gets more popular, there will only be more little girl Charlies.

Charlie

Chris is one of the longest-running and still most appealing unisex short forms, still used nearly equally for boys and girls.  Though no longer fashionable, Chris still feels crisp and appropriate for both sexes.

Chris

Cori

Chas 

Short form occasionally used on its own, with an open and friendly androgynous quality. 

Dani

Drew is an elegant formerly male-only alternative to Andy that joined the stylishly upscale Paige-Brooke-Blair sorority, thanks largely to Drew Barrymore. Barrymore comes by her first name legitimately: it was the maiden name of her paternal great-grandmother, Georgiana 'Georgie' Drew Barrymore, one of many esteemed actors in her family history.
 Jessica Simpson used Drew as the middle name of her daughter Maxwell.

Drew

Eddie

Vintage nickname name, with a down-to-earth country feel. This renewed interest placed Frankie back in the US Top 1000 in 2015 after a 41-year hiatus. For girls, it's a popular choice in England and Wales, Australia, and New Zealand.

Drew Barrymore, who helped popularize and glamorize boyish names for girls, has a daughter named Frankie. On TV's Better Things, Pamela Adlon's middle daughter is named Frankie (sister to Max and Duke, both girls).

Frankie

Freddie, especially with the ie ending, is one of the old-school boy-names-for-girls that came into vogue at the turn of the last century. Freddie, all on its own, ranked among the Top 1000 girl names until 1958, but in 2021 it was given to just 8 baby girls. Maybe that makes it prime for a comeback, ala Billie?

Freddie

A spunky boyish diminutive in the vein of Frankie, Billie and Charlie, but far less popular in the US. Georgie could be a nickname for Georgia, Georgette, Georgina or Georgiana – or just use it as it is, as over 90 sets of American parents did in 2021. 

 In the UK, Georgie has long been a stylish choice for baby girls: ranking in the Top 500 since naming records began and peaking at #175 in 2018.

Georgie

Harri

Hal 

Jamie is typical of the relaxed <a href="https://nameberry.com/search/unisex-names/j">unisex names starting with J</a> that seemed so cool in the sixties after decades of Jeans and Joans, though now pretty tepid. Jaime and even Jamey and Jayme are alternate spellings.

Jamie

One of the boys' names newly appropriated for girls -- either on its own, as a pet form of any J name, or as a singular middle name. 

Jory

Jude may be a rising boys' name, thanks to Jude Law, but it's also a new way to spin Judy or Judith as well as a name that's long been used quietly for girls as well as boys. Alexis Stewart, daughter of Martha, named her daughter Jude and Jessica Lange plays Sister Jude on American Horror Story.

Jude

TV personality Jules Asner made this middle-aged male name suddenly seem young and fresh and female, after having been an off-the radar-nickname for Julia and Julie. Author and wife of celebrity chef Jamie Oliver spells her name Jools, and we've also seen Joolz.

Jules

Jordy

Kit is a crisp, old-time British-accented unisex nickname that sounds fresh and modern today. Kitty is another so-retro-it's-cool nickname.


Lane is  a unisex name equally accessible to boys and girls. As a common surname, Lane is attached to such celebrities as Diane and Nathan.


Lane

The original brief, breezy name is somewhat out of favor now even as a middle name. The Leigh spelling has more substance and is more identifiable as female.

A foreign nickname name that has never been widely used here — possibly because of its similarity to the outdated male Lenny — it was chosen for her daughter by high-profile German supermodel Heidi Klum. 

Leni

Lou is usually a short form of Louise, Louisa, or Lucy in English-speaking countries, when Lou is used for girls at all. But in France and Germany, it's a fashionable choice all on its own, sure to gain even more widespread style credibility since Heidi Klum and Seal chose it for their daughter. At one time Lou was pervasive as a girl's middle name (Mary Lou, Betty Lou), and seems to be making something of a comeback--Louis C.K. has a Mary Lou and Keri Russell named her daughter Willa Lou.

Leo 

Mattie, which might be a short form of Martha, Matilda, or even Madeline, ranked among the Top 100 names for girls in the 1880s and in fact, has held a place among the Top 1000 for most of U.S. naming history. It fell off the popularity charts in 2014 and makes a cute, tomboyish, if somewhat slight name option.

Mattie

If Sam can make it as a girl's name, why not Max? Facebook founder Mark Zuckerberg's eldest daughter Maxima goes by Max, but you could also use it as a short form for Maxine, Maximilienne or even Margaux.

Has followed mother name Maureen off the radar screen.

Nick

A much more dynamic nickname than Nicky for any of the Nic-names. Nico was chosen by Thandiwe Newton for her daughter. 
 The single-named German Nico (born Christa) was the iconic 1960s singer with Andy Warhol's Velvet Underground.

Nico

Ollie is used less often as a nickname for the mega-popular Olivia or the stylish Olive than Ellie is for Eleanor or Allie for Allison. That may be because Ollie has a much longer use as a nickname for boys. 

Still, 106 baby girls were given the name Ollie on their birth certificates in the US in 2023, ten more than the previous year. And back around the turn of the last century, it was even a Top 100 name for girls.

Ollie

The good news: the Po is Italy's longest river, flowing across the north. The bad news: Po is a manic, scooter-riding red Teletubby. 

Quinn is one of the first popular Irish unisex surnames, a strong and attractive choice on the rise for girls but still popular for boys. Quinn was used for about 3000 baby girls and 700 boys in the US last year.
 
Quinn is the Anglicized version of the Irish patronymic surname Ó Cuinn, meaning "descendent of Conn." Conn has two possible derivations—the Old Irish cond, meaning "intellect," or cenn, meaning "chief." One of the most notable Quinn clans was from County Tyrone in Northern Ireland. 
 Quinn started taking off for girls in the mid-nineties, possibly influenced by the popular show Dr. Quinn, Medicine Woman. Since then, there have been female Quinns on the animated MTV show Daria, on Zoey 101, and—most prominently—on Glee, featuring cute blond cheerleader character Quinn Fabray.
 Some other, more <a href="https://nameberry.com/lists/category/unusual-names">unusual names</a> with the Q-factor: Quincy, Quintina, Quintana, Quinta, Quilla--and, on a different note, Queenie.

Quinn

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.

The sassy, steel magnolia appeal of Oscar-winning Reese (born Laura Jeanne—Reese is her mother's maiden name) Witherspoon has single-handedly propelled this formerly <a href="https://nameberry.com/boys-names">boys’ name</a> into girls' popularity.
 Reese was recently in the Top 10 Unisex names looked at on Nameberry.

Reese

One of the earliest of the relaxed, unisex names, now relegated to oldies rock stations. 

Ricki

Rio is one of Japan's most popular girls names, constantly sitting in that country's Top 10. Of course, Rio may also stem from the Portuguese and Spanish word for river, and the Brazilian city Rio de Janeiro. A truly international name for a cosmopolitan baby!

Ro is a casual short form that doesn't usually appear on the birth certificate on its own. But it makes a friendly nickname for any girls' name starting with Ro-.

Androgynous nickname for Veronica, Rhonda or Rona.

Ronnie

Theo has a girls' name is used for only a handful of babies today. As a short form of Theodora, Theo is used much less frequently than Thea or even Teddy. One notable appearance was as the younger daughter in Sofia Coppola's film On the Rocks in 2020.

 Not so in the half century from 1880 till 1930, when Theo was in the Top 1000 for girls. Nicknames given as full names were stylish then, as were boyish nicknames such as Billie and Tommie for girls. Theo fits this old-school trend, but these days, Theo – on its own and as a nickname for Theodore – is much more popular for boys.

Theo

Win might be an upbeat short form for a girl named Winifred or the new-fangled Winslet, or can stand on its own.  The Welsh name Wynn feels more complete and sounds the same.

Vana's list "Boyish Nicknames For Girls" of 54 great name ideas: Alex - Xan!