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Darn o drafodaeth o rhywle arall: "I suspect that Greek 'pur' and Welsh 'pry' have the same Indo-European root. 'Pyrausta', of course, is not an ancient word but was given to this genus of moths by von Schrank in 1802 and it does, I am sure, reflect the moth round the flame image." Lol, dybiwn i. Daw Pyrausta o 'pur' (tan) a 'auo' (cynnau/llosgi). Ynteu oes na gnegwath o wirionedd yma? O le daeth y gair 'pryf'? Dafydd