Schoontje Boas was a daughter of Mozes Boas and Eva Pais. She was married to Levie Hakker. The couple had at least three children: Abraham, Eva and Betje.
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In addition, a Jokos file (number 20592) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.