Meijer Cohen and Rosetta Swartenberg married in Assen in 1899. They dirvorced in 1912 in Assen. In 1942 Rosetta Swartenberg is registered on the same address as Meijer Cohen as his divorced wife.
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In addition, a Jokos file (number 17641) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.