Willem Knap was the youngest of three children of Simon Knap and Hendrika Wolffers. At the time that he was registered at the Jewish Council of Amsterdam, he was listed as "unmarried". However, Willem is still in the summer of 1942, before he was deported to Auschwitz married in Rotterdam to Grietje Frenk a daughter of Aron Frenk and Elisabeth Velleman.
On Willem's record of the Jewish Council it …