Yn rhaglen gynta'r gyfres, Ysgol y Preseli sy'n herio Ysgol Bryn Tawe a'r beirniaid ydy Sian Lloyd, Dr Elin Jones a Gwyn Williams.
Results that may be inaccessible to you are currently showing.
Hide inaccessible resultsResults that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback