Theodor Jacob Mauritz Weissman, originally Weissmann, (January 1, 1891 – March 29, 1966[1]) was a Finnish singer, songwriter and actor.

Weissman was born in Hämeenlinna in 1891 and his music career began in 1913 when he started to perform at the theatre Helikon in Helsinki.

During the Finnish Civil War Weissman performed at restaurants with Rafael Ramstedt and between 1917 and 1918 he was hired as an actor at the theatre in Vyborg.

Among Weissman's most popular songs were the waltz Linnunrata ("Milky Way") by Jules Sylvain, but mainly he recorded comic songs by Tatu Pekkarinen and J. Alfred Tanner.

[2] When the cuplés became obsolete in the 1930s, Weissman changed his occupation and worked for many years as a businessman.