Steinweg is a German surname that may refer to Henry E. Steinway (born Steinweg; 1797–1871), German-American piano maker Grotrian-Steinweg, a German manufacturer of luxury pianos C.F. Theodore Steinway (born Steinweg; 1825–1889, in Brunswick), German-American piano maker, son of Henry Klara Steinweg (1903–1972), German art historian, specializing in the Italian Renaissance. Marcus Steinweg (born 1971), German philosopher Stefan Steinweg (born 1969), German racing cyclist William Steinway (born Steinweg; 1835–1896), German-American businessman and civic leader, son of Henry