Van Belkum was born in 1965 in
Leiden. Van Belkum comes from a prominent water polo family. His brother,
Stan van Belkum, competed at the
1980 and
1984 Summer Olympics, while his niece,
Iefke van Belkum, represented the Netherlands at the
2008 Summer Olympics. Van Belkum began his water polo career with in Leiden. During his club career, he also played for Nereus and , and had a spell in Italy. He represented the Netherlands at the
1992 Summer Olympics in Barcelona, where he finished in ninth place with the
Netherlands men's national water polo team in the
water polo tournament. Van Belkum died of
leukaemia on 11 February 2026, at the age of 61. ==References==