Muench was born in Koblenz, Germany in 1940. Muench’s parents were Kurt and Hilda. It is assumed that they died in Holocaust but their fate is not known.
He was deported to the Theresienstadt ghetto in Czechoslovakia in July 1942. He was with her half-sister Tanya, who also survived, but this was not clear for many years, as there was no paperwork to prove who they were.