For girls a

Abigail has been in for so long -- the name has ranked in the US Top 100 since the late 1980s -- it's amazing that it isn't more out by now. But Abigail's biblical and historic roots make it a fashionable classic rather than a passing fad.

Adelaide is now heading straight uphill on the coattails of such newly popular sisters as Ava, Ada, and Audrey, and in the company of Adeline and Amelia. It was chosen by actress Katherine Heigl for the name of her second daughter.

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.

Adessa may be a Scandinavian variation of the place name Odessa.

A long-integrated French feminine form of Adrian, now overshadowed by the a-ending version, but still a valid option, with considerable substance and dignity—though these days more parents would probably choose Adriana.

Alice is a classic literary name that's both strong and sweet, ranking in the US Top 100 and popular throughout the western world. Alice is derived from the Old French name Aalis, a diminutive of Adelais that itself came from the Germanic name Adalhaidis, which is composed of the Proto-Germanic elements aþala, meaning "noble," and haidu, "kind, appearance, type."

Amalia is a widely cross-cultural name, heard from Italy to Romania, Germany to Scandinavia. The current heir to the Dutch throne is Princess Catharina-Amalia of Orange. It can be pronounced ah-MAH-lee-a or ah-mah-LEE-a.

Amelia is one of the hottest girls' names, a successor to the megapopular Emma and Emily. Amelia, which spent several years at Number 1 in England, is now comfortably ensconced in the US Top 10.

Anastasia is the feminine form on Anastasius, a Greek name derived from the word anastasis, meaning "resurrection." It was a common name among early Christians, who often gave it to daughters born around Christmas or Easter. There are handful of saints named Anastasia, including the patron saint of weavers.

During its Top 10 heyday in the late 90s and early oughts, Andrew was one of the "cooler" classic boy names, an update on the old guard Roberts and Richards.

Anna has become the dominant form of the Ann family, offering a touch of the international to English speakers and a bit more style than the oversimplified Ann or Anne.

Anneliese is a German and Dutch combination of Anna and Liese (a form of Elizabeth) with an Old World feel but modern appeal. The Anglicized Annalise spelling in in the US Top 500, but this authentic German version has only ever broken into the US Top 1000 once, back in 2005.

Once the most popular month names, April has been overtaken by June (for girls) and August (for boys), as well as the charmingly old-fashioned May. Literary reference: the heroine of the book and movie Revolutionary Road, and there have been Aprils on Parks and Recreation, Glee, and The Vampire Diaries. Trivia note: comedian Ralphie May named his daughter April June May.

Arden, the name of the magical forest in Shakespeare's As You Like It, is a stylish A name with a strong, straightforward image. Another reason to love Arden: its similarity to "ardent." Arden is solidly unisex, with the current gender distribution running about 60 percent girls and 40 percent boys.

Aria is a multi-cultural name with two extremely popular versions: this more word-like one along with Arya, the spelling used for the feisty young heroine of Game of Thrones. There were about 6400 baby girls named Aria in the US last year alog with 2400 named Arya, which counted together places the name in the Top 10.

The given name Athena was derived from the city name Athens, which is of uncertain origins. In Greek mythology, Athena is the name of the daughter of Zeus who was the goddess of wisdom, warfare, handicrafts, mathematics, and courage, among others. She was the great patroness-goddess of the city of Athens. In the Odyssey, Homer describes her as 'sparkling-eyed Athena.'

Aurelia is an ancient Roman name that's become a surprise hit in the contemporary world. A top favorite on Nameberry, it reentered the US Top 1000 in 2014 after a 70-year absence and continues to climb.

Ava is one of the prime examples of a modern classic name, rising thought the course of a generation into the Top 10, where it has lingered for nearly 20 years.