Bron, you got that mixed up. Gwyn / Gwen (mutated - wyn / wen) is white and bron is breast. Moel is bald and, when used in conjuction with a mountain, it's the bare summit of a mountain. Moel mutates to Foel when preceded by "Y" (which is sometimes dropped on maps which have been created at some point by non-Welsh speakers) Yr Wyddfa is the actual mountain, and Eryri is Snowdonia.

sian