https://en.wikipedia.org/wiki/Cavill

Cavell was originally the name of a township in East Riding of Yorkshire. Its meaning was taken from Old English 'Cafeld' meaning a 'field of jackdaws'. In the Domesday Book it is spelt in a Norman variant as 'Cheuede', but later developed into Cavil. The Pipe Rolls record Thomas de Kauill in 1190 living in Yorkshire. Robert de Cavilla appears in the Hundred Rolls of Lincolnshire the following century. By the early modern period the name is also spelt Cavell and Cavill. Modern American English variants include using 'cavel' meaning to mine.[1]