Hermanus Klein was a son of David Hertz Klein and Esther van der Sluis. He married Rachel Morpurgo in 1905 in Amsterdam. They had three children: Levie, Esther and Reine (who died at a young age). Hermanus remarried in 1923 to a non-Jewish woman.
Stadsarchief Amsterdam, archiefkaart Hermanus Klein
Biography