Margaret Williams, Alwyn Humphreys a Mari Wyn Williams sy'n ymuno gyda Heddyr Gregory i drafod sopranos.
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Margaret Williams, Alwyn Humphreys a Mari Wyn Williams sy'n ymuno gyda Heddyr Gregory i drafod sopranos.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
