998+ Unique, Rare, and Uncommon Boy Names (with Meanings and Origins)

Clancy, one of the original crossover Irish surname names, is as energetic and appealing as ever — full of moxie, more distinctive than Casey, and also one of the less obvious of the red-headed names.

More unusual than Justin, less word-like than Justice, this New Testament name could make an intriguing choice. After being off the popularity lists from 1904 to 1993, it is now being used in steady numbers.

Willoughby is an energetic last-name-first route to the popular short form Will, livelier than any of the two-syllable options. It could be picked up by parents attracted to the Willow sound for girls.

Ajax was the strong and courageous Greek hero featured in Homer's "Iliad," known as Ajax the Great. But it's also the name of a foaming cleanser, and if you find that reference too strong, you might try the shortened Jax instead.

Saint as a descriptive word name was first chosen by rocker Pete Wentz for his younger son (baby brother is Bronx), and now Kim Kardashian and Kanye West have catapulted the name into the celebrity stratosphere by choosing it for their baby boy. The couple called their baby "Saint" throughout the pregnancy because his conception had been so difficult. Saint was named in our predictions for the top baby name trends of 2015, on descriptive word names which also include Royal and Noble, King and Rogue. Saint is moving beyond the group of names that are only celebrity baby names and into the general lexicon.

Jago is a dashing alternative to overused favorite Jacob.

The girls have dibs on Spring, Summer, and Autumn, leaving this name evocative of snowy landscapes as the one possible seasonal choice for boys. And naturally, it's one of the most obvious names for winter babies.

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.

Romantic and artistic Domenico is ripe for the picking as a relatively rare name that fits in with current favorites such as Leonardo and Emiliano.

Sounds a bit like Harley pronounced with a cockney accent.

Like Horace, Horatio is a variation on the Latin Horatius, but its Shakespearean and optimistic Horatio Alger pedigree makes it an attractive up-and-comer, especially with its cool final o. A modern reference is the charismatic TV character Horatio Caine played by David Caruso in CSI: Miami.

Since female cousins Mitzi and Fritzi have entered the realm of possibilities, there's a chance that Cousin Fritz could as well. Fritz is the name of several notables, from early German-born film director Lang to early footballer Fritz (born Frederick) Pollard, the first African-American to play in the Rose Bowl in 1916.

When the King was alive, and for years afterwards, few people (except Declan McManus who became Elvis Costello) dared use his singular name, but now it's very much up for grabs.

This is an ancient saints' name well used in Ireland but a rarity here and unlikely to ever reach the popularity of other Finn-ish names. St. Finbarr (the more common spelling) is the patron saint of Cork and in Irish folklore, Finbarr was king of the fairies.

This is a multi-syllabic New Testament relic that could be yet another fresh way to get to Theo. In the beginning of Luke's gospel, he dedicates his words to Theophilus.

Roman statesman's name with a cool and quirky sound. Marcus Tullius Cicero was a Roman scholar, orator and lawyer who had an immense impact on the Latin language.

Noam is an underused modern Hebrew name with any number of attractive attributes attached to its meaning; it doesn't have the biblical weight of Noah, but could make a more distinctive alternative to that popular choice. Noam is a Top 10 boys' name in Israel.

One of numerous usable Irish and Scottish surnames starting with Mac and Mc, this is the real McCoy. McCoy Tyner, the well-known jazz pianist, is one of the few to use this very cool name. Bonus: Nickname Mac.

This ancient Roman family name, first borne by the distinguished Marcus Claudius Marcellus and later by two popes, is a possibilty in the hot new category of names from antiquity.

A name known in several cultures, also through animated book character Tiger Aki. Finnish author Aki Ollikainen is another notable bearer.