Joshua Spetter was married to Matje van Gelderen. the couple had seven children, of whom at least three perished in the war: Betsy, Hendrika and Wilhelmina.
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The funeral records at the Jewish cemetery in Rotterdam reveal that Josua Spetter was buried there.
In January 1942, an obituary was placed in Het Joodsche Weekblad for J. Spetter Mzn.
Het Joodsche Weekblad, 2 January 1942, 8