Kammer wrote:
That's it basically. Is this site mis-named or is 'Cerrig-y-Derwyddion' an alternative name?
"ion" is a plural suffix in Welsh, pronounced "yonn". So it seems probable that "Derwyddion" is the correct spellling. Something to do with oak trees presumably? Stone of the oak trees?I think this is the National Monument Record for it:
http://www.coflein.gov.uk/en/site/304049/details/CERRIG-Y-DERWYDDION/
("Derw" = oak; "ydd" appears to be an archaic form of "yr" = the; ion = plural suffix).