Frederik Mozes Aaron van Pels was a son of Jozef van Pels and Hemmechien Schuthof. He married 13 March 1929 in Den Haag to Catharina Salomon, a daughter of Jacobus Salomon and Saartje van Hachgenberg. The couple had three children, of whom two baby-daughters have died in 1933 at Voorburg. Their only son was Jozef.
Municipal Archive of Den Haag, marriage index, family registration card of Frederik …