| A mounted knight, a horseman (Descendant of Eochaidh)|
Haughey (Irish: Ó hEochaidh) is an Irish surname of noble origins. Spelling variations include: Hoey, McCaughey and McKeogh, among others. Modern spelling comes from the original Ó hEochaidh.
The Haugheys are descendants of the ancient Dál Fiatach dynasty, rulers of Ulaid. They trace their descent from Fiatach Finn mac Dáire, a King of Ulster and High King of Ireland in the 1st century AD. In addition to a number of Scottish clans, as well as the British Royal Family (through the House of Dunkeld), their lineage extends to the Darini/Dáirine.
Notable bearers of the surname include:Charles Haughey, Former Taoiseach (Prime Minister) of Ireland and President of the European Council
Edward Haughey, Baron Ballyedmond
Sir William Haughey, Baron Haughey
Seán Haughey, Former Lord Mayor and Minister of State
Denis Haughey, Former Minister and MEP
Hon. Thomas Haughey, Former U.S. Representative
Clare Haughey, MSP
Mary Haughey, Baroness Ballyedmond
Sharon Haughey, Former Lord Mayor
Siobhan Haughey, Olympic athlete
Paul C. Haughey
Seán Ó hEochaidh