Charlotte, the name of the young Princess of Cambridge, is the latest classic name to join Sophia, Emma, Olivia, and Isabella at the top of the popularity list. It is now among the most popular girl names in many English-speaking and European countries.

Vienna is one of the more popular of the European place-names, with a particularly pleasant sound, evoking elegant images of the Blue Danube, of castles and cafes, sweets and sausages and Strauss waltzes—and Sigmund Freud. It could be a possible substitute for the popular Sienna or Vivienne, though it has been climbing the charts itself.

Florence is back, returning to the US Top 1000 girl names in 2017 after a nearly 40 year absence. Other English-speaking countries have been quicker to welcome Florence back into fashion.

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.

Austin is one of the most attractive city names for babies, with an appealing southwestern feel and place-name panache.

This ancient name, also spelled Caspar, is finally shedding its ghostly image and moving into the 21st century. Popular in the Netherlands and Scandinavia, where it's sometimes shortened to Cas, Casper could ride the style coattails of cousin Jasper.

Kate and William shocked the world when they announced that they'd named their third child Louis, or Prince Louis Arthur Charles, to be more precise. But we've been predicting a comeback for this classic name for a long time.

Helena is one of those classic names that just misses making the US Top 1000 girl names for its entire history, falling off for a single year in 1992. Since then it's been drifting lazily up the charts, and makes a perfect choice if you want a name that both fits in and stands out.

Sofia is a refined variation of the Greek name Sophia, which was derived directly from sophia, the Greek word for wisdom. It was the name of a Roman saint—the mother of Faith, Hope, and Charity—and queens of Russia and Spain.

Odessa, (transcribed as Odesa in Ukrainian) is a Ukrainian port city and was given its name by Catherine the Great, who was inspired by Homer's Odyssey. It would make an original and intriguing choice.

A place name with a deep Southern accent, the once-obscure Savannah shot to fame, with others of its genre, on the heels of the best seller Midnight in the Garden of Good and Evil, which was set in the mossy Georgia city of Savannah. Originally a substitute for the overused Samantha, Savannah is now popular itself, long among the top girls' names starting with S.

Since we wrote a book called Beyond Jennifer & Jason, Madison & Montana, encouraging parents to move beyond overused names, it's no secret what we think of this trendy surname name, inspired by a mermaid named Madison in the 1980s movie Splash.

Effortlessly cool with a hint of the mystical, Phoenix rolls a lot of trends into one: it's a place-name and a bird name, it ends in the stylish letter x, it's got in-built nicknames, and it's unisex too. Familiar but not over-popular, Phoenix ranks in the US and UK Top 1000s.

Santiago is a spirited Spanish name with great crossover potential. It's a place-name (a city in Chile), a surname, and the name of the patron saint of Spain.

The energetic Diego is rising rapidly along with a lot of other authentically Spanish baby names that work perfectly well with surnames of any origin.

As trendy as the chic Colorado ski resort, with a hint of whimsy from the shimmering trees, Aspen has been climbing the charts for boys since the early 90s. While it has always been more popular for girls, it could work for a boy too.

Orlando, the ornate Italianate twist on the dated Roland, with a literary heritage stretching back to Shakespeare and before, has appealing book-ended o's, and is open to combination with almost any last name, a la British actor, Orlando Bloom.

Unlike its somewhat formal Swiss city namesake, this is a lively and appealing place-name that also has a real history as a female name.

Siena is a soft and delicate Tuscan town name given a big fashion boost by lovely young actress/gossip column staple Sienna Miller. A real up-and-comer.

Augusta is a dignified name reminiscent of wealthy great-aunts and stately homes, but with the fashion for both August and Gus for boys, and the renewed interest in clunky classics like Gwendolyn and Winifred for girls, Augusta might just appeal to contemporary parents.