http://en.wikipedia.org/wiki/Henry_Middleton_(governor)

Henry Middleton (September 28, 1770 – June 14, 1846) was an American planter and political leader from Charleston, South Carolina. He was the 43rd Governor of South Carolina (1810–1812), represented South Carolina in the U. S. Congress (1815–1819). He served as Minister to Russia (1820–1830), being sent there in the first instance to replace George Washington Campbell so as to look after slave-owners' interests in the discussions preparatory to arbitration by Czar Alexander I on the question of compensation under Article 1 of the Treaty of Ghent as regards enslaved Americans who went away with British during and after the War of 1812.

His father (Arthur Middleton) and his grandfather (Henry Middleton) had both served in the Continental Congress