Wikipedia
Durnovaria
Durnovaria is the Latin form of the Brythonic name for the Roman town of Dorchester in the modern English county of Dorset. The first element in the name *durno- may mean "fist" ( Welsh dwrn ‘fist, knob’) the second may be related to Old Irish fáir ~ fóir denoting a confined area or den. Another and more consistently Brythonic derivation might be from "Fawr" Welsh meaning 'great' (c.f Vortigern) hence 'great fist'.