Jacob Sweijd was a son of Philip Sweijd and Sophia de Beer. He married in Borgerhout (Belgium) on 27 June 1912 to Rachel Monnikendam, a daughter of Salomon Monnikendam and Sara Kaseres. The couple had one daughter: Sophia.
City Archive of Amsterdam, archive card of Jacob Sweijd and website www.wiewaswie.nl.
A biography on Jacob Sweijd can be found at the website WesterborkPortretten of the Memorial Center of the transit camp Westerbork.
Addition of a visitor of the website