Whittington's fairy glen

This small wood near Whittington Hall in the very south of Staffordshire county (on the Worcestershire border) is known as 'Fairy Glen'.

I'm interested in why myths arise (see previous post!).
There are two possible reasons (I think) for the nomenclature in the case of Fairy Glen: the dappling effect in sunlight, and the sudden rise in the ground on on side, could lead an imaginative person to believe that there are small movements going on in the peripheral vision; and, secondly, it's a half-mile or so from the nearest farm, so anything could happen there in the witching hours... and you'd never know.
Yes, okay, even my 'reasons' are fanciful - but it's nice to ponder.