Meaning Derived from the element 'fionn' meaning 'white' or 'fair'. Origin of Finnian Celtic , Irish Popular Middle Names James, Leon, Michael, Murphy, Patrick, Sebastian, Thomas, Alan, Charles, Fredrick Pronunciation 🔊 Listen Finnian FIYNIYahN Similar Names Cormic Donal Findlay Argus Christophe Gogo Gwylim Ananda Jackson Roarke Year by Year Popularity of Finnian