The McClintocks were a Scottish family from Luss and Balloch on Lough Lomond in Argyll. They settled in north west Donegal during the early 17th century. By the 1750s, Alexander McClintock had made sufficient fortunes as a barrister to found the family demesne at Drumcar in County Louth. His ultimate heir John McClintock would marry Jane Bunbury and so give life to the McClintock Bunburys of Lisnavagh. The McClintock genes lay claim to a number of historical celebrities including Generals Montgomery and Alexander, Speaker John Foster, the Barons Rathdonnell, Dame Marie Colvin and the explorer Sir F. Leopold McClintock.