- William Carter
- William Cartwright
- William "Cat" Anderson
- William Catanzaro
- William Catanzaro
- William Cavanaugh
- William Caycedo
- William Cepeda
- William Cepeda & Afrorican Jazz
- William Chan
- William Chapman
- William Charles 'The Hustler'
- William Chatterton Dix
- William Chico Schwall
- William Chico Schwall
- William Ching
- William Chrey
- William Christie
- William Christie
- William Christie and les Arts Florissants
- William Churchville
- William Clark
- William Clark
- William Clarke
- William Clarke
- William Clauson
- William Clauson and the Oro y Plata de Pepe Chavez
- William Cleere & the Marvellous Fellas
- William Cochran
- William Cody Watson
- William Coleman
- William Colvig
- William Colvig & Lou Harrison
- William Conrad
- William Control
- William Conway
- William Cooper
- William Copper
- William Corkine
- William Corlett
- William Cornysh
- William Cornyshe