Rudolf "Ru" Jacob van der Haar (6 October 1913 in Banjoemas, Java, Dutch East Indies – 15 May 1943 in Maoemere, Dutch East Indies) was a Dutch field hockey player who competed in the 1936 Summer Olympics.

He was a member of the Dutch field hockey team, which won the bronze medal.

He died in a Japanese camp during World War II.

This biographical article relating to a Dutch field hockey figure is a stub.

You can help Wikipedia by expanding it.This article about a Dutch Olympic medalist is a stub.