William B. "Bill" Lava (March 18, 1911 - February 20, 1971) was an American composer and musical arranger who worked on the Warner Bros.' Looney Tunes and Merrie Melodies animated cartoons from 1962 to 1969, replacing the deceased Milt Franklyn, making him the last composer in the classic era of Warner Bros. Cartoons. William's music was different from that of Milt and original composer Carl Stalling. It has a tendency towards atonality. A sense of tension is often created in William's scores, using sequences based on the notes of the diminished seventh chord. William also composed and sang the theme to the popular TV western series Cheyenne.