Duifje Kat was born in Amsterdam on 4 September 1888 as a daughter of Salomon Kat and Fanny Cohen-Kool. She married there on 19 May 1909 Michel Walvis, a son of Salomon Walvis and Dina Grishaver, who was born on 8 June 1889 in Amsterdam. Duifje and Michel had two children, viz. Dina on 11 March 1910 and Samuel on 12 October 1916.
Dina married Hijman Hakker in 1929 and had four children with him. A…