Whilst other people stood around, quick thinking Ethan jumped into the water and swum under the man, bringing him to the safety of the river bank.
Tra bod pobl eraill yn sefyll o gwmpas, deifiodd Ethan i’r dŵr a nofio o dan y dyn gan feddwl yn gyflym, a gan ddod ag ef i ddiogelwch y lan.