Namesakes
American Presidents:
2 presidents
George H. W. Bush (a.k.a. Walker) 1989-1993 
George W. Bush (a.k.a. Walker) 2001-2009
Notable Actors and Entertainers:
1 actor
Benjamin Walker (a.k.a. Walker) 1982-
Notable Athletes:
1 boxing, 1 football
(boxing) "Sugar" Ray Robinson (a.k.a. Walker) 1921-1989
(football) Mason Crosby (a.k.a. Walker) 1984-
Notable Evildoers:
1 criminal
John Walker Lindh 1981-
Notable Musicians:
1 musician
Zac Hanson (a.k.a. Walker) 1985-
Olympic Medalists:
1 silver
(silver) William Robinson (a.k.a. Walker) 1908 swimming - 200 m breaststroke