Louis de Vries was married previously to Sara Groenberg's older sister Elize. Louis and Elize had two children: Sophia and a child that survived the war.
Addition of a visitor of the website
In addition, a Jokos file (number 5713) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 12477/12159).