Robbert Kees Boer was born in 1981.
Robbert Dijkgraaf was born on 1960-01-24.
Robbert Klomp was born on 1955-05-14.
Robbert Schilder was born on 1986-04-18.
Kees Bakels was born in 1945.
Kees Boeke was born in 1884.
Kees Boertien was born in 1927.
Kees Verkade was born in 1941.
Kees Posthumus was born in 1902.
Kees Verhoeven was born in 1976.
Kees Ouwens was born in 1944.
Kees Bastiaans was born in 1909.
Kees Bruynzeel was born in 1900.