The likelihood of the w word for prostitute coming from Cornish seems an unbelievably unlikely theory. Us Cornish get around ("Find a hole in the ground anywahere in the world and there's a Cornishman at the bottom of it") but we'd have needed good communications to get it into English whore;Dutch hoer.German hure.Old Norse horr.Gothic hors.Not to mention related words with the same root:Latin cara, Irish cara,French chere.Plus Breton and Welsh already mentioned etc etc, the list is endless. You needto look east to some proto Indo-european language. we invented oggies and tin mining, butnot whores.