In August 1940, an obituary was placed in the Nieuw Israëlietisch Weekblad for Johanna Appelboom-Roos.
Nieuw Israëlietisch Weekblad, 16 August 1940
Johanna was the widow of Simon Appelboom (1853-1917) they had 6 children
Stadsarchief Amsterdam, archiefkaart Johanna Roos.