Kasriel (Cost) Patriarch, Weyl is mentioned 69 times between 1612 and 1660. He died around 1660. His designation in the Stühlingen family tree is 'R2'.
Cost is mentioned in the first letter of protection [R1; 04.01.1615]. In 1631 he is identified as brother of Leman [R2684; 06.27.1631] , and therefore belongs to the extended Weyl family. Cost was married [R3799; 04.03.1660] , but apparently didn`t have children. He plied the usual cattle trade. .