Sophia, Louise and Catherine Kloet were sisters. They were the daughters of Marcus Kloet and Celine Cohen Kloot.
Amsterdam Municipal Archives; record card of Sophia Kloet
In addition, Jokos files (numbers 52592, 52596) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.