The only son of Eliazer Wijnberg and Roza van Polen was Jozef Elkan Wijnberg, who was born in Groningen on October 17, 1923. He lived with his parents at Mesdagstraat 60 and 69 but moved with them on February 12, 1940, when he was 17 years old, to Niersstraat 18, 2nd floor in Amsterdam.
Jozef Elkan Wijnberg had a 3-year MULO education and worked as a warehouse and office clerk and an apprentice t…