Jaap Ypenburg was born on November 1, 1951.
Jaap Van der Poll was born on June 19, 1889, in Amsterdam, Noord-Holland, Netherlands.
Jaap Krijtenburg was born in 1969.
Jaap Stockmann was born in 1984.
Jaap Boot was born in 1903.
Jaap Burger was born in 1904.
Jaap Boersma was born in 1929.
Jaap Bulder was born in 1896.
Jaap Kraaier was born in 1913.
Jaap Meijer was born in 1905.
Jaap Bakema was born in 1914.
Jaap Flier was born in 1934.
Jaap Marais was born in 1923.