Namesakes
Callum Keith Rennie
(m) 1960- 
Notable Actors and Entertainers (actor)
Callum Blue
(m) 1977-
Notable Actors and Entertainers (actor)
Callum Turner
(m) 1990-
Notable Actors and Entertainers (actor)
Jonathan Brownlee
(middle name Callum) (m) 1990-
Olympic Medalists 2012 triathlon (bronze)