Hendrika Wolffers was a daughter of Lion Wolffers and Ester Emrik. She married Simon Knap in Rotterdam on 13 March 1901, a son of Marcus Knap and Debora van Emrik. Hendrika and Simon had three children together, namely Debora, Esther and Willem. Her daughter Debora had an illegitimate child in 1926, named Simon, who lived in with his grandparents Hendrika and Simon. He was killed in Auschwitz on 3…