Duifje van der Molen was a daughter of Meijer van der Molen and Esther Appel. She married 24 April 1919 in Amsterdam the cigar maker Wolf Hartlooper, a son of Joseph Hartlooper and Sara Bonte. The couple had one son, Joseph, who was born in Amsterdam in 1926.
When Wolf Hartlooper was still unmarried, he worked in Antwerp as a cigar maker. After his marriage in 1919, he became a café holder; he own…