Jacob Vernet was a prominent theologian in Geneva, Republic of Geneva, who believed in a rationalist approach to religion. He was called "the most important and influential Genevan pastor of his day".
Jacob Viner was a Canadian economist and is considered with Frank Knight and Henry Simons to be one of the "inspiring" mentors of the early Chicago school of economics in the 1930s: he was one of the leading figures of the Chicago faculty. Paul Samuelson named Viner as one of the several "American saints in economics" born after 1860. He was an important figure in the field of political economy.
Jacob Waxman, or in Yiddish Yankev Vaksman was a Yiddish playwright who wrote dramas and tragedies, as well as operettas; he also dramatized novels and stories for the Yiddish stage. His operettas include Der libling fun froyen, Malvinke vil azoy, and Di sheyne Berta, which were orchestrated by Yitskhak Shlosberg (1877–1930).