Marcus Colmans was married to Mina Kanes. He was a typographer, his wife was a seamstress. Their daughter Helena Betty was born in Westerbork transit camp on 24 april 1943.
Record of birth certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
In addition, a Jokos file (number 9745) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.