Namesakes
Klaas-Jan Huntelaar
(m) 1983- 
Notable Athletes (soccer)
Klaas-Erik Zwering
(m) 1981-
Olympic Medalists 2004 swimming - 4x100 m freestyle relay (silver)
Klaas Vermeulen
(m) 1988-
Olympic Medalists 2012 field hockey (silver)
Klaas Dijkhoff
(m) 1981-
Notable Politicians and Statespeople