Plantation of Ulster
All land owned by Irish chieftains of the O'Neill dynasty (Uí Néill in Gaelic) and O'Donnell dynasty (Uí Domhnaill in Gaelic) was taken from them, and used for the colonists. This land added up to an estimated half a million acres (2,000 km²) in the counties County Donegal (called Tyrconnell at the time), Tyrone, Fermanagh, Cavan, Coleraine and Armagh. Most of counties Antrim and Down were privately colonised.