Jacob Vecht was the son of Heiman Vecht and Jetta Bendix.
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He was married to Bertha Weijl. The couple lived at 3 Rhijnvis Feithlaan in Zwolle with their daughter Helena and with the family of their son Charles with his wife and three children. Rosa Vecht was a daughter. Jacob Vecht was a wholesaler.
D. Stibbe and J. Hagedoorn, Herinneringsboek joods Zwolle 1940-1945 (Zwolle 1995)