I regard named natural outcrops as of potential archaeological relevence, so long as the names old of course, and not just a place. For example, Jenny Twig and her daughter Tib up in my neck of the woods. My reasoning is that they were possibly on an ancient route.

As to wether they are MA, not sure I'm qualified, but I'd say Jenny and here daughter became significant prior to the Romans. I'm thinking the name Jenny is a variant on Ginny, as in Ginny Green Teeth.

Think that's how you spell it.