Samson de Vries was a son of Isaac de Vries and Flora Onderwijzer. He married 22 April 1942 in Amsterdam to Elizabeth Rozet Cohen who was previously married in 1935 but divorced in 1938, a daughter of Izak Cohen and Rebecca Vrouwtje Cohen.
Samson de Vries had another brother Adlof and a sister Elisabeth who have been killed too during the Shoah.
City Archive of Amsterdam, archive cards of Samson …