Namesakes
William McMahon
(m) 1908-1988 
Australian Prime Ministers 1971-1972
Vince McMahon
(m) 1945-
Notable Businesspeople
Brigitte McMahon
(f) 1967-
Olympic Medalists 2000 triathlon (gold)
Julian McMahon
(m) 1968-
Notable Actors and Entertainers (actor)
Sean McMahon
(m) 1994-
Notable Athletes (rugby)