Catharina Johanna "Toos" Beumer (born 5 July 1947 in Koog aan de Zaan) is a Dutch swimmer. She won the bronze medal in the 4×100 metres freestyle relay at the 1964 Summer Olympics in Tokyo. Her teammates in that race, clocked in 4:12.0, were Pauline van der Wildt, Erica Terpstra and Winnie van Weerdenburg. Four years later, Beumer also participated in the 1968 Summer Olympics in Mexico City, in the 100 m freestyle, but she didn't qualify for the semi-finals.[1]

Toos Beumer
Toos Beumer 1963.jpg
Toos Beumer in 1963
Personal information
Full nameCatharina Johanna Beumer
Born5 July 1947 (1947-07-05) (age 74)
Koog aan de Zaan, Netherlands
Medal record
Women's swimming
Representing the  Netherlands
Olympic Games
Bronze medal – third place 1964 Tokyo 4×100 m freestyle
European Championships
Gold medal – first place 1966 Utrecht 4×100 m medley
Bronze medal – third place 1966 Utrecht 4×100 m freestyle


  1. ^ Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill; et al. "Toos Beumer". Olympics at Sports Reference LLC. Archived from the original on 18 April 2020. Retrieved 19 May 2010.