Hoey (O`Hoey) is an Irish surname. Spelling variations include: Haughey, McCaughey and McKeogh, among others. Modern spelling comes from the original Ó hEochaidh. The Hoeys are descendants of the ancient Dál Fiatach dynasty, rulers of the Ulaid. They trace their descent from Fiatach Finn mac Dáire, a King of Ulster and High King of Ireland in ....