Grietje Kropveld was a daughter of Mendel Kropveld and Jetta Leviet.She was married with Jozua Colthof. He died in 1937. Together they had two children. Addition of a visitor of the website
In addition, a Jokos file (number 54405) on this person 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 1).