The jazzy, ultra-cool Dexter, like most names with an "x," has a lot of energy and dynamism.

A few decades back, this name -- which hardly shows its Irish roots -- evoked a man in a gray flannel suit; now, though still upscale, it's more likely to be attached to a female.

Gareth, the name of a modest and brave knight in King Arthur's court, makes a sensitive, gently appealing choice, used more in its native Wales than anywhere else.

Finnigan is another way to spell Finnegan, one of the energetic Irish surname-names in vogue now. One note: While Finnigan, Finnian, Finley and so on are appealing names on their own, you don't need to use a longer form to get to Finn, which is a perfectly proper name all on its own.

Has a sharp investigative quality that's not a bad thing to impart to a child.

Harper got its start as a celebrity baby name when Paul Simon chose it for his now-grown son. Since then, other famous parents have followed suit: musician Tim Finn and actor Cecilia Peck both have sons called Harper.

Arlen is a surname long used as a first name: It ranked on the US Top 1000 from the late 1920s until the late 1960s. Originally, Arlen was a variation of Harlan which came from Harland, a place-name which means "hare land" – a place with lots of rabbits.

Adair has flair, the grace of a Fred Astaire, and a daring, spirited vibe. It's usually considered a Scottish surname, derived from the name Edgar, though other possibilities are that it derives from the place name, Adare, meaning "ford of oak trees" or from the Irish Darragh meaning "oak tree". In any of these cases, it is pronounced uh-DEHR.

Evoking the image of a shady glen, Slade could make a distinctive middle name. It entered the Top 1000 in 2007, and has been seen as a character name on the TV show "Smallville." It's also a name that pops up in comic books and video games.

Variant of Artemas

Updates Ellis -- but also has a lot of feminine potential thanks to Allison/Ellie similarity.

Corin was used by Shakespeare in As You Like It, an unusual name that could make a more distinctive alternative to Corey or Colin. It is a name used in the illustrious Redgrave family of actors.

After half a century, this otherwise feasible name has at last started to lose its link to the friendly ghost; it certainly didn't scare model Claudia Schiffer, who chose it for her son, as did Atomic Kitten Jenny Frost. Iconoclastic namer Jason Lee switched genders and called his daughter Casper. Also related to the revived Jasper, Caspar seems headed towards the path to a similar resurgence.

The additional syllable makes Lark a masculine surname name, borne by poet Philip Larkin.

One of Dumas' swashbuckling Three Musketeers, now better known as a men's cologne.

In Shakespeare's The Tempest, Caliban is the name of the deformed son of a witch: not the greatest literary reference for a child. But Caliban does have an appealing international-yet-accessible feel and a rhythmic sound. As long as nobody knows its origin, it might make a great name for a boy or even a girl.

Seneca's distinguished heritage as the name of the ancient Roman philosopher-playwright who tutored Nero, and of an Iroquois tribe makes this an interesting choice for either sex.

The girls have Violet and Scarlet and Ruby and Rose, but for the boys there's a much more limited palette of color names. Grey/Gray is one exception, which could make for a soft and evocative—if slightly somber—choice, especially in the middle. Kaitlin Olson and Rob McElhenney named their son Leo Grey.

Derived from the name Caradog, the handsome ancient Celtic name was worn by one of the Knights of the Round Table, as well as a semi-legendary Welsh King. Possibly a cognate of Cedric and Carys, Caradoc is ultimately derived from the Brythonic name Caratācos meaning "loved", itself originating from the Celtic karu.

Clad in armor. But while this name may have been forbiddingly antiquated not that long ago, the connection to the trendy nickname Os or Oz makes it a real possibility.