Jonas Jacobs studied medicine in Amsterdam, where he sat for his medical finals on 23 November 1932. He lived and practised medicine at 49 Den Texstraat in Amsterdam. Jonas Jacobs was married to Lena Melkman. Lena Melkman studied medicine in Amsterdam, where she sat for her medical finals on 26 February 1936. She also took a masters degree in education. According to the Geneeskundige Jaarboekjes (medical yearbooks), she did not practice medicine.
Jonas Jacobs and Lena Melkman had three children, who survived the war.
J.H. Coppenhagen, Anafiem Gedoe‘iem. Overleden joodse artsen uit Nederland 1940-1945 (Rotterdam 2000) 103, 116
Their third child was born during the war and hence actually never lived at the address mentioned here.
Addition of a visitor of the website
In addition, a Jokos file (number 18833) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.