Maurits Rine was the eldest son of Salomon Rine and Rachel Hakker. His mother had passed away before the war, his father died in 1941 in Amsterdam. Joël had eight brothers and sisters, who were all killed, with their families.
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In addition, a Jokos file (number 32842) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.