One of Clay’s ancestors, Dr. Andrew Jackson Clements, was a member of the House of Representatives from TN from 1861-63. He is listed as a Unionist member of the Thirty-seventh Congress (1861-63) from Tennessee. He is mentioned in several letters Lincoln wrote.
Lynnandtonic Blog 
One of Clay’s ancestors, Dr. Andrew Jackson Clements, was a member of the House of Representatives from TN from 1861-63. He is listed as a Unionist member of the Thirty-seventh Congress (1861-63) from Tennessee. He is mentioned in several letters Lincoln wrote.
That is quite awesome!