* As a Scottish surname, from Scottish Gaelic Caimbeul, from cam (“crooked”) + beul (“mouth”). Compare Cameron, from Scottish Gaelic cam (“crooked”) + sròn (“nose”). * As an Irish surname, from Mac Cathmhaoil (“son of Cathmhaol”), see Caulfield, Cowell. * As an English surname, variant of Camel, probably influenced by the above. * (duck breed): Developed by Adele Campbell.