Gornest gynderfynol gyntaf 2018, rhwng ysgolion Syr Hugh Owen a Bro Hyddgen! Syr Hugh Owen and Bro Hyddgen compete in the first semi-final of Radio Cymru's annual pop quiz! Show more
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Gornest gynderfynol gyntaf 2018, rhwng ysgolion Syr Hugh Owen a Bro Hyddgen! Syr Hugh Owen and Bro Hyddgen compete in the first semi-final of Radio Cymru's annual pop quiz! Show more
Ail wasanaeth BBC Radio Cymru sy'n cynnig sioe frecwast bob bore'r wythnos.
