Save Type Surname (from given name) Usage Irish Meaning & HistoryExpand Links Irish Gaelic form of Hennessy. Related NamesDetails VariantsAngus, Guinness, Hennessy, MacGinnis, MacGuinness, Mag Aonghuis, McGinnis, McGuinnessOther Languages & CulturesAngus, Innes, MacAngus, MacInnes, McInnes(Scottish) MacAonghais(Scottish Gaelic)