Israël van Gelder was the son of Carel van Gelder and Geertrui Schaap. He married in 1884 to Kaatje Weinberg, who died in 1932. Probably they lived for some time in the USA. Two children were born there. Israël and Kaatje had six children: Isaak, Jetta (1888-1930), Frederika and three children who survived the war.
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