GlomelGroňvel [Glomael, 1295]
Goulou in Breton means ‘bright’ or ‘light’ [W: golau ; OC: golou] and Gaulish : mello means ‘hill’ or ‘promontory’ [W: moel ; Sc: mull].
The name can be compared to Bringolo in Côtes d'Armor; Alltgolau, Nant-y-moel and Moelfre in Wales.
The Breton and Welsh examples all refer to hills. This makes sense, particularly with moel which is a ‘bare/bald hill’ and is very likely to refect the sunlight cf. Rhyd-y-foel (Wales).
Glomel's other treasure is a menhir (8.5 x 4m):