Judah (Lehmann) ben Samuel, Weyl is mentioned 7 times between 1703 and 1740. He died around 1729. His designation in the Stühlingen family tree is 'W1.1'. His father was Samuel, Weyl - Donaueschingen.

Although not explicitly mentioned until 1710, he probably moved from Tiengen to Donaueschingen in 1683 together with the rest of his family [R1310; 05.11.1683]. He seems to have led a comfortable life under the halo of his successful father [R16; 01.01.1720] . He also had passage rights in Stühlingen, although he appears to have behind in paying the corresponding fees [R540; 04.12.1716] . As son of the court Jew Samuel he seems to have felt close to the princely house, for when he was baptized in 1729 [R4570; 01.01.1729], he chose the baptismal name `Antonius Joseph Ernst`, although the biography of Joseph Wilhelm Ernst, Prince Fürstenberg, (RR#5) provides not a hint that Lehmann had ever met his name sake personally. .