Isac (Isaac) ben Menachem, Bernheimb is mentioned 7 times between 1734 and 1742. His designation in the Stühlingen family tree is 'A1.1.1'. His father was Menachem (Menckhen) ben Salomon, Bernheimb.
Isac ben Menachem Bernheim paid passage tax (Geleitgeld) from 1735 to 1740, after his family had already moved to Tiengen. .