Robbert Kees Boer was born in 1981.
Robbert Schilder was born on 1986-04-18.
Robbert Dijkgraaf was born on 1960-01-24.
Robbert Klomp was born on 1955-05-14.
Kees Vlaanderen was born in 1964.
Kees Hin was born in 1936.
Kees Christiaanse was born in 1953.
Kees Staf was born in 1905.
Kees Torn was born in 1967.
Kees Luesink was born in 1953.
Kees Klop was born in 1947.
Kees Maks was born in 1876.
Kees Verkade was born in 1941.