Garth Grugyn
An English hill, site of the last stand of the piglet Grugyn (after whom the hill was evidently named).
During the epic hunt of Twrch Trwyth, Arthur's warriors pursued Grugyn Silver Bristle here and killed him, but Rhuddfyw Rhys and many other men were lost in the battle.
Garth, meant an inclosure, a buttress in old Welsh. The Persian gird, Norse garth, and the Anglo-Saxon yard, is a place girded round, or garded. Buarth, from bu, kine, and garth, a small inclosure, was situated on a hill in perilous times. Lluarth, from llu, a legion, and garth, inclosure, means an entranchment on a hill.