Jaap Valkhoff was born in 1910.
Jaap Van der Poll was born on June 19, 1889, in Amsterdam, Noord-Holland, Netherlands.
Jan Jaap Korevaar was born in 1957.
Jaap Speyer was born on November 29, 1891, in Amsterdam, Noord-Holland, Netherlands.
Jaap Stobbe was born on November 7, 1936, in The Hague, Zuid-Holland, Netherlands.
Jaap Maarleveld was born on March 11, 1924, in Vlaardingen, Zuid-Holland, Netherlands.
Jaap Valkhoff died in 1992.
Jaap Van der Poll was born on June 19, 1889, in Amsterdam, Noord-Holland, Netherlands.
Jaap Krijtenburg was born in 1969.
Jaap Boot was born in 1903.
Jaap Kunst was born in 1891.
Jaap Boersma was born in 1929.
Jaap Burger was born in 1904.
Jaap Kraaier was born in 1913.
Jaap Bulder was born in 1896.
Jaap Goudsmit was born in 1951.
Jaap Bakema was born in 1914.
Jaap Stockmann was born in 1984.