( > Do you mean "cwrcyn"? Not that I dispute your linguistic talents - though ) > this may be a regional variant. ( ) gwrcath, cwrcath, cwrcyn -- is the last one a compound of gwr/cwr + ( cyn? If so, what is "cyn" here? cwrcath > cwrc > cwrcyn by accretion of a diminutive ending? Cwrc is spoken but perhaps not often written. I don't know whether it has a convincing plural, hence the suggestion of 'cyrc' (actually the plural of corcyn, a bottle-cork), which sounds about as convincing as 'mwncwn' for the plural of 'mwnci'. I have heard 'cyrcs' as an informal spoken plural for 'cwrc'. Cwrcod? Cwrcynod? Perhaps you only see them one at a time. I suppose it's probably "cwrcynnau" or "cyrcynnau" (like llyfryn -nau). Unfortunately 'mwncwn' and 'twrcwn' have almost become sort-of acceptable (if you have the nerve) for mwnci%od and twrci%od, so you never know. Gwlad yr hetiau gwrach, y jac codi baw a'r chwarae gyda geiriau. g