Klaartje Polak was a daughter of Levie Polak and Grietje Slap. She married 5 March 1914 in Zaandam to Daniel Italiaander, a son of Barend Italiaander and Jansje Slier.
Her other siblings, who also were killed during the Holocaust were Hijman, Rebecca, Abraham, Esther and Meijer.
City Archive of Amsterdam, archive card of Levie Polak and website www.wiewaswie.nl.
Biography