Percy Jackson/Heroes of Olympus Names

Mellie is not Millie and it's not Nellie, though it will forever be confused with those too more familiar nicknames. It's cute, too, and while some of the names it's usually short for may be sailing into the sunset (so long, Melody!), others like Amelia are rising through the ranks and may give Mellie a new chance to shine as a cute girls' nickname. Just be prepared for endless confusion.

Michael was the Number 1 American boys' name for almost half a century. While Michael has moved out of the Top 10 baby boy names, it's still widely used.

Nico is one of the great nickname names, full of charm, energy and effortless cool -- a neo Nick.

Percy is an adorable old name that is finally shedding its pampered Little Lord Fauntleroy image in this new era of boys with soft yet traditionally male names like Jasper and Elijah. Originating as an aristocratic Norman name, Percy became fairly widespread in England--and to some extent in the US--as an offshoot of the fame of the poet Percy Bysshe Shelley.

Phoebe is the Latin variation of the Greek name Phoibe, which derived from phoibos, meaning "bright." In classical mythology, Phoebe is the by-name of Artemis, goddess of the moon and of hunting. The masculine version of Phoebe is Phoebus.

Piper is a bright, musical name that entered the list in 1999, one year after the debut of the TV series Charmed, which featured a Piper, and it's been a consistent riser since. Piper Kerman is the memoirist whose prison experiences provided the basis for the hit Netflix series Orange is the New Black.

Castor's twin in the constellation Gemini. That final x makes this name modern and cool.

This variation is actually more popular in the United States than the original Spanish Reina.

Sally is a cheerful, fresh-faced girl-next-door name that was originally a nickname for Sarah, but has long been used independently. Sally was popular in the eighteenth century and then again from the 1920s to the 1960s--it was just outside the Top 50 around 1940. Though it hasn't been heard as a baby name for decades, we can see Sally bouncing back, especially after her exposure as young Ms. Draper on Mad Men--the Nameberries rank it at Number 621, and it's a Top 100 name in Sweden.

Thalia was one of the Three Graces in Greek mythology, and also the Muse of comedy and pastoral poetry, making this a Hellenic choice worthy of consideration.

Has a laid-back rural feel some would associate with country singer Travis Tritt; Kyra Sedgwick and Kevin Bacon chose it for their son. Travis Scott, born Jacques Webster Jr., a popular rap artist, is another famous Travis.