Namesakes
John C. Calhoun
(a.k.a. Caldwell) (m) 1782-1850 
Notable Politicians and Statespeople
John Abbott
(a.k.a. Caldwell) (m) 1821-1893
Canadian Prime Ministers 1891-1892
Caldwell Esselstyn
(m) 1933-
Olympic Medalists 1956 rowing (gold)