Namesakes
Nobel Prize Winners:
1 physics
(physics) Jack Kilby (a.k.a. St. Clair) 2000 
Notable Scientists and Inventors:
1 engineer
Jack Kilby (a.k.a. St. Clair) 1923-2005
Olympic Medalists:
1 silver
(silver) Art Chapman (a.k.a. St. Clair) 1936 basketball