Hendrikus "Hennie" Zacharias Keetelaar (23 January 1927 – 28 January 2002) was a Dutch water polo competitor. He played two matches at the 1948 Summer Olympics where his team won a bronze medal. He won a European title two years later.
See also List of Olympic medalists in water polo (men)
References Hennie Keetelaar . sports-reference.com Men Water Polo European Championship 1950 Wien (AUT) – 20–26.08 Winner Netherlands. todor66.com
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