by Jim Young (guest)
4/3/2007, 6:44 AM
Dornin is an Irish surname, though that doesn't rule out the possibility of its independent existence in other languages and cultures.
There are three possible Irish language originals - Ó Doirnín and Ó Duirnín, which I think are likely to be two versions of the same surname; and Ó Dornáin, which may or may not be a third version of the same name. All belong to the province of Ulster, and all are ancestral names based on the word DORN, meaning "fist".