Sir Donough MacCarty, 1st Earl of Clancarty (1594–1665), was an Irish soldier and politician. He succeeded his father as 2nd Viscount Muskerry in 1641. He rebelled against the government and joined the Irish Catholic Confederation, demanding religious freedom as a Catholic and defending the rights of the Gaelic nobility. Later, he supported the King against his Parliamentarian enemies during the Cromwellian conquest of Ireland.

Confederate Ireland, also referred to as the Irish Catholic Confederation, was a period of Irish Catholic self-government between 1642 and 1652, during the Eleven Years' War. Formed by Catholic aristocrats, landed gentry, clergy and military leaders after the Irish Rebellion of 1641, the Confederates controlled up to two-thirds of Ireland from their base in Kilkenny; hence it is sometimes called the "Confederation of Kilkenny".