Save Type Surname (from given name) Usage Irish Meaning & HistoryExpand Links From Irish Ó Donnchadha meaning "descendant of Donnchadh". Related NamesDetails RootDonnchadh (given name)VariantsDonaghue, Donohoe, Donohue, Ó DonnchadhaOther Languages & CulturesDuncan, Duncanson(Scottish) Categories brown, colors, war