Major General (Rtd) David Nial Creagh, The O'Morchoe (also known as David O'Morchoe), CB, CBE, KLJ, (born 17 May 1928, Dublin, Ireland) is a former British Army general. O'Morchoe is President of the Royal British Legion - Republic of Ireland  and also President of the reconstituted Leinster Regiment Association. He is the hereditary Chief and Prince of the Ó Murchadha (Murphy) Sept, a cadet line of the ancient Irish dynasty the Uí Cheinnselaig, who were Kings of Leinster.
He is a prominent figure at the Irish National Day of Commemoration ceremonies that are held in the Royal Hospital in Kilmainham, which is held annually to honour Irish men and women who died in past wars or in service with the United Nations. From 6 to 11 June 2007, The O'Morchoe represented the Association during the commemoration ceremonies in Belgium.
Major General David Nial Creagh O'Morchoe was awarded the CBE in the British New Year Honours 2007's Diplomatic Service and Overseas List "for services to British ex-servicemen and women in Ireland". In September 2010, he was invested as a Knight in the Military and Hospitaller Order of St. Lazarus of Jerusalem .
- Curley, Walter J.P., Vanishing Kingdoms: The Irish Chiefs and their Families. Dublin: Lilliput Press. 2004.
- Ellis, Peter Berresford, Erin's Blood Royal: The Gaelic Noble Dynasties of Ireland. Palgrave. Revised edition, 2002.