i'r chwarelwyr. O'r boblogaeth o tua 1,000, mae o gwmpas 70% yn siarad Cymraeg . English: The village of Tregarth lies near Thomas Telford 's A5 London to Holyhead road between the village of Bethesda and the city of Bangor in Gwynedd , North Wales . Media in category "Tregarth" The