Sientje Katz was a daughter of Abraham Katz and Hendrina Nathans. She married 526224 in 1906 in Arnhem.
Stadsarchief Amsterdam, archiefkaart Sientje Katz
According to Genlias Salomon Polak and Sientje Katz married in 1902 in Arnhem.
Sientje Polak-Katz took her own life under pressure of the circumstances.
NIOD, Records Joodse Raad, box 36d, letter dd. 2 October 1942