He is married to (Not public).
They got married on August 11, 1949 at Breukelen, he was 22 years old.Source 1
Child(ren):
P.N Kalkman Pag. 221.
6 kinderen bekend.
Xdw. KLAAS KALKMAN. Geb. Rotterdam 14 jan. 1927. Beroepsmilitair. Zn. van Pieter Kalkman en Klasina Lolkus. Tr. Breukelen 11 aug. 1949 Hendrika Berendina Smink, geb. Utrecht 8 apr. 1927, d. van Berend Smink en Hendrika Kerstbergen, Nassauplein 2, Breukelen.