Jacob Drukker lived at 16 Smaragdstraat in Amsterdam. Under pressure of the circumstances, he took his own life some day between 17 and 31 May 1943. NIOD, Records Joodse Raad, box 36d, letter d.d. 31 May 1943
In addition, a Jokos file (number 38516) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.