Pam nofio mewn llyn neu afon bob dydd ym mis Chwefror? Dyna'r cwestiwn i Meilyr Wyn. Aled asks Meilyr Wyn what made him swim in a lake or river every day in February. Show more
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Pam nofio mewn llyn neu afon bob dydd ym mis Chwefror? Dyna'r cwestiwn i Meilyr Wyn. Aled asks Meilyr Wyn what made him swim in a lake or river every day in February. Show more
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
