Gair y dydd: tennyn https://www.geiriadur.ac.uk/gpc/gpc.html?tennyn Cortyn neu gadwyn i ddal neu arwain anifail. Dyma un o Pompeii. Cave canem! (Gochelwch rhag y ci)
CC BY NC ND Robin Dawes https://www.worldhistory.org/image/12743/roman-guard-dog-mosaic/
CC BY NC ND Robin Dawes https://www.worldhistory.org/image/12743/roman-guard-dog-mosaic/
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