The energetic Pennant climbed Beinn an Oir, the highest of the Paps Of Jura, but he mentioned its near neighbour, Beinn Shiantaidh. This translates as the “Enchanted Mountain”, or more precisely “the Mountain Defended by Enchantment”. No archaeological information exists to confirm or deny its use as such, but the name strongly suggests that the mountain was important in the beliefs of the prehistoric peoples of lived on Jura. As Pennant notes, it is one of three grouped close together, and triplicity was thought to be spiritually powerful in the ancient world. And high places seemed to attract those who felt it was important to be near their sky-gods.
Alistair Moffat “Before Scotland”
Studying Pennants Tour Of Scotland 1772.