Girl

Adeline has a lovely, old-fashioned "Sweet Adeline" charm, but has become so popular in the US under so many spellings and variations -- with Adalynn and Adalyn also popular -- that considered together it is far more popular than it first seems. Adorable nickname Addie is also pervasive.

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.

Emma has now been among the top girl names in the United States for several years, claiming the Number 1 crown in 2008 and again from 2015 to 2018 before dropping back to second place.

Dated 'creative' spelling of Irish classic.

A kind of old-fashioned nickname name that's enjoying some fresh life thanks to trendy brother Lane. Lainie is a more old-school spelling.

Lillian has ranked among the US Top 50 for the past 20 years, making it Lily's less popular but more grownup cousin.

Lilly may contain one L too many for some people, though this secondary spelling of a name that's become wildly popular is still a popular choice. And the Lilly spelling does feel a bit less wispy, a bit more like a name as opposed to a mere flower, than the slender and delicate Lily. Lilly suggests the long-form Lillian, but it doesn't need to be an abbreviation for anything; Lilly can stand on its own.

Originally inspired as a a girls’ name by eighties TV actress Mackenzie Phillips, parents have flocked to Mackenzie – once only a male name – for their daughters. Harry Potter creator J.K. Rowling is one of the thousands who've chosen Mackenzie. Other Mac names, such as Makayla and McKenna, are also newly popular for girls.

Madeline, a lovely name with a soft and delicate image, is an old-fashioned favorite that returned to favor in the 1990's, combining a classic pedigree with a cute nickname option: Maddy.

Sleek and sophisticated single-syllable choice that has NEVER been in the Top 1000, though sister name Paige has ranked since the mid 1950s. Though off her peak, Paige is still in the Top 200. Along with Poppy, Patience, and Plum, Page is one of the girl names that start with P that are also words.

Penelope is an unlikely 21st century baby name success story. Off the Top 1000 for 25 years, Penelope jumped back on in 2001 and has been heading uphill ever since, propelled by the trend for mythological names, Spanish actress Penelope Cruz, and some high-profile celebrity babies.

While Tobin is technically a variation of the Biblical Tobias and so a male name, it's a newfangled version that's been drafted for the girls' team by Olympic soccer star Tobin Heath, who plays for the U.S. women's national professional soccer team.

Zoe is one of those surprising names that has been on the Top 1000 nearly every year since 1880, but it's only since the turn of this century that it's ranked in the Top 100.