William (Bill) Colvig (March 13, 1917 – March 1, 2000) was an electrician and amateur musician who was the partner for 33 years of composer Lou Harrison, whom he met in San Francisco in 1967. Colvig helped construct the American gamelan used in works such as the puppet opera Young Caeser [sic] (1971),[1] La Koro Sutro (1972),[2] and the Suite for Violin and American Gamelan (1974).