Michel Jakob Biermann was married to Antje Annelise Gans, daughter of Jacob Gans and Charlotte Zuntz. He worked as an electrician. On 3 June 1943 their second child, Charlotta Japha, was born in the transit camp Westerbork.
Record of birth certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
In addition, a Jokos file (number 50422) 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 913/15412).