The family Roos lived at 90a Essenburgsingel in Rotterdam. Jacques Roos was appointed as a special courier by the Rotterdam precinct of the Jewish Council, but when even the staff of the Jewish Council were called up, the family went into hiding in Veenendaal. Jacques Roos and his wife Rebecca Sanders were staying with the Vink family in the Da Costastraat. Their son, Samuel Hans Roos (nickname Ha…