Jacob Aub (c. 1821 - May 7, 1885) was a German-born Jewish American lithographer. He arrived in the United States prior to 1847, at which point his lithographic output begins to appear. He became an American citizen in 1851, and partnered with his citizenship sponsor Norman Friend to form the lithographic firm of Friend and Aub. During the Civil War he In 1861, Aub joined the Union Army, serving as quartermaster, but his military career does not seem to have spanned the entire war: in 1863 he left both lithograph and the military to join the silk manufacturing firm of Aub, Hackenburg & Company.