Namesakes
American Presidents:
1 president
Ulysses S. Grant (a.k.a. Simpson) 1869-1877 
Notable Actors and Entertainers:
1 actor
Tobias Menzies (a.k.a. Simpson) 1974-
Notable Military Figures:
1 general
Ulysses S. Grant (a.k.a. Simpson) 1822-1885