Isaac Voorzanger was a son of Joseph Voorzanger and Heintje Springer. He married Jansje Park on 5 May 1909 in Rotterdam, a daughter of Jozef Park and Sara Polak. The couple lived more than one time in Belgium, in Borgerhout and Antwerp, but also in Rotterdam.
Isaac and Jansje had nine children; in Borgerhout Henrica (1910) and Josephus (1912) were born; In Rotterdam Anna (1915), Emanuel (1917), Ab…