Ar ôl pymtheg wythnos, pwy yw pencampwyr 2018 - Ysgol y Preseli neu Ysgol Syr Hugh Owen? After 15 weeks, only one school can win Radio Cymru's annual pop quiz for schools!
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Ar ôl pymtheg wythnos, pwy yw pencampwyr 2018 - Ysgol y Preseli neu Ysgol Syr Hugh Owen? After 15 weeks, only one school can win Radio Cymru's annual pop quiz for schools!
Ail wasanaeth BBC Radio Cymru sy'n cynnig sioe frecwast bob bore'r wythnos.
