Clara (Clarissa) van Kollem was the older sister of Maurits. She went into hiding with him and his wife in Laren (Hein Keverweg 1). They were betrayed and arrested on 30 September 1943.
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Clara is een dochter van Hartog van Kollem (A'dam, 21 augustus 1876 - A'dam, 28 november 1936) en Maria Leefman (A'dam, 26 oktober 1875 - A'dam, 22 januari 1940).
Bron SAA archiefkaart Maria Leefman 26-10-1875