Isac ben Meir, Weyl is mentioned 13 times between 1734 and 1744. His designation in the Stühlingen family tree is 'W1.3.4'. His father was Meir (Marum, dicker) ben Samuel, Weyl.
Isac appears to be the youngest son of Meir (Marum, dicker) ben Samuel of Donaueschingen [R188; 01.01.1740]. He paid protection tax from 1740 to 1743 when he was given an extension to stay another year with his ailing father in Stühlingen [R1218; 07.27.1743] . He probably moved with his father to Gailingen. .