In his younger days the Eagle of Glern Ably liked to brag about how high his crag was (very high) and how he could dive from it (very fast) and how skilled he was with knucklebones (not very skilled at all). Came a time he lost one roll too many to the Salmon of Lwyn Lwyw.
“I’ve nought to pay you for a forfeit,” grumbled the Eagle of Glern Ably. “Shall I peck you down a star?”
“Actually,” said the Salmon, “I’ve got something I’d like to trade you, friend.”
And that’s why there are too many Ws in Gwern Abwy.