Bernard Koopman was a son of Joel Koopman and Dientje de Vries, both from Leeuwarden, who were married in Amsterdam on 20 August 1885. Bernard was the youngest son of a twin; his twinbrother was David who became an upholsterer and who was unmarried. Bernard, also an upholsterer, married Sara Saphie…
In addition, a Jokos file (number 33723) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.