cockchafer: [18] Etymologically, cockchafer (a medium-sized beetle) is probably a ‘large gnawer’. The second part of the word, which goes back to Old English times (ceafor), can be traced to a prehistoric base *kab- ‘gnaw’, source also of English jowl. The first element, cock, may be an allusion to the species’ greater size in relation to other chafers. => jowl
