Marianne Schenkkan was a daughther of Samuel Schenkkan and Lena Katoen. She married in Zaandam on 4 May 1910 to Isaac Plas. The couple had three children: Vrouwtje, Lena and Arie. Marianne moved to Apeldoorn on 21 October 1930.
Municipal Archive of Amsterdam, archive card of Isaac Plas and Genlias.