Rosa Catharina van der Heijden was the widow of Gustave Schaap. The couple lived at 32 Amazonenstraat in Amsterdam. Gustave Schaap was previously married to Debora Visser, but that marriage was dissolved through divorce. He had a child that survived the war.
Amsterdam municipal archive, Records Jokos, Möbel-claim 34796; property Joods Maatschappelijk Werk