Known as Marshal Keith, born near Peterhead, of an old Scotch family, Earls Marischal of Scotland; having had to leave the country for his share in the Jacobite rebellion, fled first to Spain and then to Russia, doing military service in both, but quitted both in 1747 for service in Prussia under Frederick the Great, who soon recognised the worth of him, and under whom he rose to be field-marshal; he distinguished himself in successive engagements, and fell shot through the heart, when in the charge of the right wing at Hochkirch; as he opened his way by his bayonet the enemy gathered round him after being twice repulsed (1696-1758).