The family immigrated to the U.S., first to Pittsburgh, then Detroit, then finally St. Louis, In the 1880 census, Jacob (24) is listed as living at his parents' place in St. Louis, where his father, Moses Lampert, originally spelled Lamport, born 1827, cigar maker, is still head of the household.
In 1912, Jacob was elected Grand Master of the Masons of St. Louis.
In 1921, he died and left his entire estate to his younger sister, Rosa Lampert.
She offered the nephews and nieces $50,000 to share if they would not litigate, but they went ahead with the lawsuit.
In the end, Rosa Lampert prevailed, and won the entire amount.