Unique High-Energy Baby Names

Io may be one of the slightest names in the book, but there aren't many two-letter names with as much substance as this Greek mythological example. Io, a name used for the largest moon of Jupiter, was in classic myth raped by Zeus and escaped from him by changing herself into a cow.

Hart could be the hero of a romantic novel, but on the other hand, it's short, straightforward, and strong sounding. The most famous bearer of the name was tragic poet Hart (born Harold) Crane, but it also has musical cred via Lorenz Hart, of the classic Rodgers & Hart songwriting duo and a literary tie to playwright Moss Hart.

J.K. Rowling is a modern master of naming who brought a whole constellation of ancient and celestial names to modern parents. Bellatrix, of one of the stars of Orion, combines fashionable names Bella and Beatrix to make a convivial and original name. The down side: the Harry Potter character Bellatrix, played by Helena Bonham Carter, is a character so evil she's called a Death Eater, killing one beloved character and being murdered by another. And the name Bellatrix is so closely associated with that character that it might be challenging to sidestep the association.

A sassy, spunky, punchy kind of name, Dixie can also be considered a place name, one that has become problematic because of its association with the antebellum South. The Dixie Chicks recently dropped Dixie from their band name because of its association with slavery and white privilege.

This popular Turkish name has a very on-trend sound and is familiar to English speakers thanks to Orson Scott Card’s sci-fi novel Ender’s Game. The book has recently been turned into a movie, starring Asa Butterfield as Andrew "Ender" Wiggin.

Like Vita and Viva, one of several similar life-affirming names, this one was chosen by Matthew McConaughey and his Portuguese-born wife Camila. Vida may also be a diminutive of Davida. Australian suffragette and human rights campainer Vida Goldstein is an notable bearer of this name.

Now that names like Cannon and Gunner, fit for comic book heroes, are rising up, Rogue may fit right in.

Roxy, also spelled Roxie, is one of those high-stepping showgal names with plenty of moxie, among the many sassy nickname names on the U.K. popularity list--currently Number 398.

A key figure in Norse legend and a traditional Scandinavian favorite making inroads here.

Jago is a dashing alternative to overused favorite Jacob.

An appealing Irish placename with a unisex feel, Ennis would be a fresh alternative to Dennis and Ellis. It's little-used for boys and even rarer for girls, but since Kirsten Dunst and Jesse Plemons used it for their son, it could be one to watch.

Pixie is a cute -- quite possibly too cute -- name that suddenly feels possible thanks to the craze for names that contain the letter x. Though its origin may be uncertain, a pixie is internationally recognized as a sprite or fairy: tiny, sometimes green, usually pointy-eared.

This unusual and alluring choice was used by David Mamet for his daughter, who is now grown and an actress on the hit show Girls.

Bellamy is emerging as an up-and-coming girls' name, an Irish surname-y riff on the super-popular Bella series of names. While the Bella connection makes Bellamy sound a little trendier and more popular than it really is, we see the name possibly rising through the ranks for both genders in the coming years.

Rollo is a livelier, roly-poly, o-ending version of Roland.

Bijou is a name that lives up to its definition -- a real jewel. Warning: not unheard of on poodles' dog collars. Actress Bijou Phillips is its best known bearer. It can also be spelled Bijoux.

Usually adding an e to the end of a name makes it more feminine, but Locke is at most recent count used only for baby boys. Still, this stylishly strong one-syllable name is theoretically gender-neutral.

Mitzi is a spunky German nickname name that might appeal to parents drawn to the genre of lively vintage chorus girl names that proliferated in 1930's musicals. Lively entertainer Mitzi Gaynor--who was originally named Francesca Marlene de Czani von Gerber--made the name notable in mid-century America.

Jubilee has a joyous and jubilant aura, but it wouldn't be an easy name to carry, what with all that pressure to be a living, breathing, 24-7 party. Jubilee was the name selected by television's Duggars for their miscarried child.

This cool and quirky short form of the suave Ludovic could be an even-more-adventurous spin on Nico and Hugo.