Ymweliad gan Siôn Corn, a hanes Elfed Williams yn dringo'r Wyddfa bob wythnos am flwyddyn. Elfed Williams explains why he has climbed Snowdon weekly throughout 2017. Show more
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Ymweliad gan Siôn Corn, a hanes Elfed Williams yn dringo'r Wyddfa bob wythnos am flwyddyn. Elfed Williams explains why he has climbed Snowdon weekly throughout 2017. Show more
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
