I’ve no doubt that option 3 plays a part in this either. I’m sure there’s been a lot syncretism or fusion over the years. Interestingly, some holy wells in Cornwall were also associated with divination. According to folklore, Gulval Well was looked after by an elderly lady and young women would go to the well and consult it as some kind of oracle to find out about their futures. I think there are some similar traditions with holy wells in Ireland. I’ve read that Madron well also had some association with divination, too. At other wells, coins or bent pins were left to the piskies.