Samuel Duis was a son of Barend Duis and Saartje Blits.
Stadsarchief Amsterdam, archiefkaart Barend Duis
A friend of the family remembers that when the Duis family was to be deported to Poland, Samuel Duis did not understand why he had to go there as an agrarian labourer: "Am I physically strong enough for arable farming in Poland? "
Addition of a visitor of the website