Salomon de Vries was the son of Arend Levie de Vries and Rachel van der Horst.
Salomon de Vries was first married to Sara Bouwman, who died in 1921. They had two children: Aron and a child that survived the war.
Addition of a visitor of the website
In addition, a Jokos file (number 9786) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.