Salomon Philip Zwarts, a merchant, was a witness at the wedding of his brother Willem Salomon Zwarts to Rebekka Lindeman. The marriage was performed at Westerbork transit camp on 6 October 1942.
Salomon Philip Zwarts signed the marriage certificate.
Record of marriage certificates of the Westerbork Municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen