There should be an accent on the surname version: Ó Donnabháin. I've never met an Irish-speaker with this first name, but if I did, I would expect it to be spelled Donnabhán in that case, as Donnabháin is the genitive, 'of Donovan'.
Why is it from Ó Donnabhain? Shouldn't they just say it's from Donnabhain?Great name, though. Very masculine and cool. And it is certainly NOT the only Irish name that is so.
― Anonymous User 4/5/2008
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I have a book of names that says it means "Dark Warrior".