Simon Achttienribbe was married. He and his wife had three children. The family lived in Amsterdam. Simon Achttienribbe taught at the Joods Lyceum [the secondary school that the Nazis forced Jewish students to attend]. As a member of the De Groot resistance group, he supplied Jews in hiding with ration coupons and identity cards. On 4 February 1943 he was arrested in Groningen and deported to Sobibor via Westerbork.
NIOD, Erelijst Verzet en Koopvaardij, database made by J.W. de Leeuw;
B. Braber, Zelfs als wij zullen verliezen. Joden in verzet en illegaliteit in Nederland 1940-1945 (Amsterdam 1990) 144-145
.