Alternative Name: Comin Gelligaer
Morphology: gelli+caer
Phonetic: com-in-gare-ll-ee-guy-rr
Not so much a settlement as a scattering of dwellings on this open upland, the main population being Welsh Mountain ponies and other horses. Running roughly northwards across the Common is the Roman road from Cardiff to Y Gaer, near Brecon and this is still clearly visible above Fochriw.