Declan is the Anglicized form of the Irish name Deaglán. St. Declan was one of the first missionaries to bring Christianity to Ireland, preceding St. Patrick. Originally from Wales, he founded the monastery of Ardmore in Ireland.

Fionn, the modern Irish form of Finn, is more popular in Ireland these days than Finn, which is rising fast in the U.S. where Fionn is virtually unknown. That's probably a good thing, because few Americans would know that Fionn and Finn have the same root and are pronounced the same, like the fin of a fish. It's the namesake of a great hero from Irish mythology, Fionn MacCumhaill, who acquired divine wisdom by eating an enchanted salmon of knowledge.

One of several Anglicized forms of Caolán, this spelling is borrowed from the Old Irish root, cáel.

Tiernan is the slightly edgier and sharper cousin of Kiernan. This is one Irish surname that is attractive but distinctive; Tierney is another, related, option.

If you like the idea of Tadhg but don't feel like the spelling works where you are, Teague might work as an alternative. It could also fit the bill if you're seeking a unique single-syllable first or middle name for your son.

Less popular than the Bueller-inspired Sloane but following on its coattails, this name ranks toward the middle of the Top 1000, but we see both spellings sticking around for years to come.

Odhran, Anglicized as Oran, was the name of an ancient saint. Today, Odhran is among the Top 100 Irish names for boys in Ireland.

Conjures up pleasant images of lakes, but the pronunciation challenge makes the Anglicized Loughlin preferable.

An Irish last-name-first-name that could make a child feel distinctive, while still having the regular guy nickname of Quinn. Christine Taylor and Ben Stiller spelled their son's name Quinlin.

The Danish and Norwegian form of the classic Margaret and the name of the reigning Queen of Denmark, who has been on the throne since 1972.