Rhagymadrodd Testun golygedig Llawysgrifau English

St Cynog of Merthyr Cynog (Hywel Dafi)

golygwyd gan Barry Lewis

Canolfan Uwchefrydiau Cymreig a Cheltaidd, Prifysgol Cymru / University of Wales Centre for Advanced Welsh and Celtic Studies

Prifysgol Cymru Y Drindod Dewi Sant / University of Wales Trinity Saint David

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