Hate to burst your bubble, but from This Site Devin is Gaelic for Poet
OLSON
How about Li’'l Bastard?
Or, barring that: 
Dante “Lasting”
Darcy “Dark one” Oh yeah!
Darwin “Dear friend”
Denzel “Wild One”
Desmond “One From S. Muenster” WHAT?
Dillon “Faithful”
Donato “Gift”
Donovan “Dark Warrior” Oh yeah!
Dustin “Warrior”
Duncan “Dark Warrior” Oh yeah!
and someone else mentioned
Dylan “Son o’ the sea”
Go for a good D name. D-named boys always do well in life.
Knorf
Clearly, Pablo.
David would be an awesome choice – “D” name, masculine, works in both English (“Day-vid”) and French (“Dah-veed”). Lots of famous Davids in history.
Damien is another good bilingual name, but if you’re not Catholic it might not appeal to you, and it has unfortunate baggage from the movies. The similar sounding name Damon comes from Greek mythology.
Daniel is another classic that works in two languages (“Dan-yul” for English, “Dan-yel” for French). Dante would be cool if you’re very literary, but might seem a little exotic next to Alex, Ben, and Clara. How about Darwin, to honor the father of evolutionary theory? Best not name the kidlet Darius, unless you want him and big brother Alex fighting over Persia in a couple of decades.
Dionysos is a great name, but might be better to go with it’s plainer cousin, Denis. Donatien is properly French, but do you really want to name your son after the Marquis de Sade? Donovan and Duncan are good Irish names but I dunno how well they translate.
My suggestion: Dorian, after the title character of Oscar Wilde’s novel. How much cooler can you get?
Ah, yes. http://www.babynameworld.com/
Very amusing. As much credibility as the national enquirer, thought not quite as funny. Kind of good if you want a made up name, or a name from some culture that’s not your own, so you don’t understand if they got it wrong.
This one has a bit more research behind it. They do find it exists, but it’s an Anglicised version of an Irish surname with some other meaning altogether. http://www.behindthename.com/nmc/iri.html
If you really want to look up a gaelic dictionary, try http://www.ceantar.org/Dicts/search.html (Guess what doesn’t turn up. And guess what “poet” isn’t translated into.)
OK, this has absolutely nothing to do with the very sensible OP. Anyone caring can move on here: http://boards.straightdope.com/sdmb/showthread.php?s=&threadid=215025.