2021 Relativity
2021 Relativity
Willem Valkenburg(26 Feb 1852 - 26 Feb 1929)
Elisabeth Heus(Apr 1856 - 14 Mar 1939)
Geertruida Willemsdr Valkenburg
b. Feb 1881
d. 23 Jul 1954, Rotterdam, ZH
updated 3/27/21
copyright 2021 Jean Wisner Dupon