Alida van der Horst married Joseph Vos, a son of Isaac Vos and Alida de Vries, on 18 March 1942 in Amsterdam.
Alida van der Horst was born in a family with seven children, of whom three children have survived the war. The other siblings, Meijer, Simon and Izaak have been killed during the Holocaust.
Stadsarchief Amsterdam, archiefkaart Alida van der Horst.