Johan Eduard Barnstijn was a son of Bernhard Barnstijn and Helena Cahen. He married Berendina Wilhelmina Trompetter in Amsterdam on 1 October 1930, a daughter of Simon Trompetter and Geesje Vogelzang. Berendina was previously married but divorced from her first husband. She had a daughter from that marriage, born 20 January 1922 in Den Haag. Berendina and Johan Eduard Barnstijn have been divorce t…