Abraham Muller was a son of David Muller and Mietje van der Horst. He was previously married to Eva Denneboom. She died in 1933. They had a son Joël.
Addition of a visitor of the website
This person is commemorated on a memorial in Hoogeveen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.