Dim ond ers pedair blynedd yr oeddwn i wedi adnabod Hefin, ond canolbwyntiais ar dri pheth: ei dosturi, ei ymrwymiad a'i fod yn canolbwyntio ar Gaerffili.
I'd only known Hefin for four years, but I focused on three things: his compassion, his commitment and that he was Caerphilly-focused.
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