Terence O'Neill, Baron O'Neill of the Maine, English captain and politician, 4th Prime Minister of Northern Ireland (b. 1914)

Terence Marne O'Neill, Baron O'Neill of the Maine, PC (NI) (10 September 1914 – 12 June 1990), was the fourth prime minister of Northern Ireland and leader (1963–1969) of the Ulster Unionist Party (UUP). A moderate unionist, who sought to reconcile the sectarian divisions in Northern Ireland society, he was a member of the Parliament of Northern Ireland for the Bannside constituency from 1946 until his resignation in January 1970; his successor in the House of Commons of Northern Ireland was Ian Paisley, while control of the UUP also passed to more hard-line elements.