Johanna Geertruida Zwarenstein was married to Heiman Leefsma. The family lived at 9 President Steynstraat in Amsterdam. Johanna Geertruida Zwarenstein may have been born in Hengelo rather than in Rotterdam. Four children survived, including three from a previous marriage of Heiman Leefsma.
The archive of the Stichting Sieraden-Comité contains a list of the items of jewelry stolen, a statement taken under oath and a statement of the right to inheritance from 1959.
NIOD, Records Stichting Sieraden-Comité, box HF 12, file 177
Biography