Riley—an upbeat, friendly surname name—is red hot for girls and still going strong for boys. If you haven't been spending much time around babies recently, you may be surprised to learn that Riley is the most popular girls' name starting with R and also the Number 1 Irish name for girls in the US.

Austrian actress Romy Schneider seemed to be the singular bearer of this international nickname name until it found new style currency in the past decade, entering the US Top 1000 for the first time ever in 2024.

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.

Sophie is the French form of the Greek Sophia, for which it is also commonly used as a nickname. Given Sophia's long standing among the Top 10 girl names in the US, Sophie may feel more popular than it actually is.

Ellie first took off in the UK—yes, in this nickname form—and this warm and friendly name has also become hugely popular here. In 2011, Ellie entered the US Top 100 girl names for the first time and has remained near the top of the charts ever since.

Kit is a crisp, old-time nickname with plenty of spirit and style. In the UK it's a rising star for boys, while in the US, it is trending upwards for girls too.

Scarlett Johansson is doing more for this sparky southern name than Scarlett O'Hara ever did. Since the turn of the 21st century, Scarlett has gone from an obscure literary name to one of the most popular girls' names starting with S, right after longtime favorites Sophia and Sofia.

Marlowe is very much in the air, with its lovely -o ending and the modern twist it offers on the likes of Margaret, Margot, Martha, and Marlene. But is it Marlowe, Marlow, or Marlo? Well, for a girl in the US at least, it's probably Marlowe, with this spelling the only one to appear in the Top 1000.

A favorite in England and Wales, Darcy is a unisex option with delicacy, grace, and strength. Associated with classic literary and courtesy thanks to Jane Austen's hero, Mr. Darcy, and Bridget Jones's Mark Darcy, its image was partly transformed by English ballerina Darcey Bussell, who helped popularize it for girls.

This pet form of such names as Winifred and Edwina and Gwendolyn has loads of vintage charm, a la Millie and Maisie, with a decidedly winning vibe. And it just got celebrity cred as the baby daughter of Jimmy Fallon.

Avery is a hugely popular name in the US, especially for girls. But while nearly four times as many girls as boys are named Avery today Avery's popularity is starting to soften for girls while it continues to strengthen for boys.

Billie is a tomboy nickname name, part of the growing trend for using boyish nicknames for girls and now destined for stardom along with its most famous contemporary bearer, music sensation Billie Eilish.

Remi is an adorable name that's fashionable and keeps gaining momentum. Remi entered the US Top 1000 in 2013 and is now approaching the Top 100.

Nickname name Lainey has been rising since the turn of the century to become a Top 200 girls' name in the US today.

Charlie is a friendly, boyish nickname name now used slightly more frequently for girls than boys, with over 2200 baby girls named Charlie last year versus about 2100 boys. That makes Charlie one of the most evenly-balanced and most popular unisex names around today.

Jovie has a lively and cheerful sound and makes a fresh twist on old (and new) favorites like Jody, Josie, and Jolie. It could be considered a short form of Jovita, Jovena, and Jovana - all feminine forms of Jove, the Roman king of gods - but it could equally work as a stand alone name.

Like Peggy and Patsy, Penny is a peppy vintage nickname that fell out of favor (and the Top 1000) for a while, but has recently rebounded by reentering the charts in 2013. Expect it to continue gaining traction on the heels of Penelope.

Stevie survives as a short form of Stephanie thanks to the immortal Ms. Nicks. After a little more than a decade out of the limelight, she rejoined the US Top 1000 in 2014. It is now leading the trend of boyish nicknames for girls - standing alongside picks like Charlie and Scottie.

Holland is one of the coolest geographical names, unadorned and elegant, evocative of fine Rembrandt portraits and fields of pink and yellow tulips. It first entered the US Top 1000 for girls in 2014, but fell out of the Top 1000 for boys a century earlier.

Cute boyish short forms like Teddy and Frankie and Billie are in some ways a relic of the past, of the days before unisex names, when girls were given feminized versions of their father's names, but they are starting to come into their own again.