Save Type Surname (from given name) Usage Irish Meaning & HistoryExpand Links Anglicized form of Irish Ó Fionnagáin meaning "descendant of Fionnagán". The given name Fionnagán is a diminutive of Fionn. Related NamesDetails VariantsFinn, Ó Fionnagáin, Ó Fionnáin Categories anglicizations Entry updated July 27, 2015
