After the death of his first wife, Max Wertheimer married Berta Baum in 1918. Together with his son Erich and their sons Kurt and Herbert Werner, the couple moved to Nymphenburger Straße 29 in 1926.
After the Nazis came to power in 1935, Max Wertheimer's son from his first marriage emigrated to the United States, while his half-brother Kurt was able to flee to Palestine via Prague. In 1939, the Wertheimers were forced to leave their apartment on Nymphenburger Straße and move into collective accommodation for Jews. Their son Herbert Werner lived in an apprentice hostel run by the Jewish Community and trained there as a carpenter.
For unknown reasons, the apprentice Herbert Werner was arrested in January 1940. After being imprisoned in Stadelheim, Neudeck and Landsberg, the Gestapo deported Herbert Werner Wertheimer to the Dachau concentration camp in March 1941, where the 17-year-old was shot on the same day. Berta and Max Wertheimer were deported by the Gestapo to the Piaski ghetto in 1942. There, all traces of them are lost.