Knollyrock

• knoll: a hilltop; hillock

• knolly: full of or abounding in knolls or hillocks

• gnarl: a knotty protuberance on a tree

• gnarly: knotty; contorted; rugged, weatherbeaten; ill-natured, bad-tempered

• Old Noll: a nickname of Oliver Cromwell
  • Third Census of Finnegans Wake
  • Wikipedia