Space and Celestial Names

While this has a distinguished male namesake -- astronomer Edmund Halley and his comet -- it still strays too close to the superpopular feminine Hailey family to work for some parents for a boy. Fewer than five baby boys were given the name last year, but that could change as formerly-female names become more acceptable for boys.

Feels as if it's missing a syllable.

The name of the young Greek sun god, brother to the moon goddess Selene, who rode across the sky each day in a chariot pulled by four horses.

Hesper is a feminine form of Hesperus, the name of the Greek mythological personification of the Evening Star. The Hesperides are daughters of nymphs of the evening. Hesper may be related to the name Vesper as well as Hespera and Hesperia.

Hespera is a variation of Hesperia, the feminine form of Hesperus. In Greek mythology, Hesperus is the Evening Star or the planet Venus. Hesperus is the son of the dawn goddess Eos or her Roman equivalent Aurora.

Hesperia is the name of one of the Hesperides, known as the daughters of Hesperus or evening. Hesperus is the personification of the evening star in Greek mythology, better known as Venus in Roman mythology. Variations include Hesper and Hespera.

Hesperos or Hesperus is the personification of the evening star in Greek mythology; in Roman myth, that role is held by Venus. There's a Longfellow poem called "The Wreck of the Hesperus" about a tragic ship voyage.

The disgraced heroine of The Scarlet Letter's name, after long neglect, just might have a chance at revival, following in the wake of sister-name Esther. We've characterized her elsewhere as an eccentric aristocrat, much more accepted in the U.K. than she has been here.

A spirited name with major cross-cultural significance. In addition to its celestial meaning in Hawaiian, it means "rhyme" in Finnish and "congratulations" in Japanese.

Like a large proportion of traditional Hawaiian names, Hoku can be used for both girls and boys.

Possible middle name for devotees of detective Sherlock.

Short and catchy form of traditional Asian name.

Hunter has been dropping a bit for the past few years but is still one of the leaders of a distinctive band of boys' names that combines macho imagery (Hunter, Austin, Harley) with a softened masculinity. Hunter was for years attached to gonzo journalist Hunter S. Thompson; Josh Holloway used it for his son.

This surname gained momentum in the 1990s, when it was particularly in vogue for males. However, it seems to be experiencing a surge for females—it was one of the fastest-rising names of 2013, jumping 266 spots back into the Top 1000.

Hydra is the largest of the 88 constellations, whose name was inspired by Hydra of Lerna, a serpentine, multi-headed monster of Greek mythology who resided in Lake Lerna.

Used more for girls in Europe, but definitely sounds masculine enough for a boy here.

A bright and sparky Basque name with a lovely celestial meaning.

One of the most romantic names, the lovely and stylish Juliet seems finally to have shaken off her limiting link to Romeo. In Shakespeare's play, it was Juliet who said "What's in a name?"

Jupiter's partner Juno has entered the mainstream, so it's possible that her divine mate could follow. But not necessarily for boys — Jupiter is currently mostly female in the US, thanks to its similarity to Juniper. Stars including Ed Sheeran and Ashley Tisdale recently welcomed daughters named Jupiter, which could shift the balance even more towards the girls.