Guy Carleton, first Baron Dorchester, was born at Strabane, County Tyrone, on the 3rd of September 1724, the anniversary of Cromwell's two great victories and death. He came of a very old family of English country gentlemen which had migrated to Ireland in the seventeenth century and intermarried with other Anglo-Irish families equally devoted to the service of the British Crown. Guy's father was Christopher Carleton of Newry in County Down. His mother was Catherine Ball of County Donegal.