It is a carry over from middle English copweb being a middle English word for spiders web there would have been many dialect variations of the language but some words would be used in many of them
Looking further the Dutch word for spider is spinnekop with the end part of the word kop being the spider and the spinne being spinning
The German word for spider is spinne
With English German and Dutch all being derivatives of the same base languages looks like kop or cop for spider is a word that would possibly have been used BC so has been in use for a long time
Germanic languages - Wikipedia, the free encyclopedia
Brian
Thanks Brian! Clears that nagging question right up.