You might be thinking of Torpenhow. It's not clear the etymology actually supports the "hill hill hill" (I thought it did). But there are enough silly names like that for a Wikipedia list:
https://en.wikipedia.org/wiki/List_of_tautological_place_nam...
Quite a few of the English ones are incidentally down to either Norse or Germanic influence. E.g. most island names ending in "-ey" (compare -øy) that has gotten "island" added, like Canvey island.