Attested: Ptolemy 2,3,16 Ριγοδουνον, a πολις of the Βριγαντες.
Where: Kleineberg et al. (2012) reckoned Elslack
Roman fort at SD92474944 is a better fit to Ptolemy's coordinates than Castleshaw guessed by R&S.
Name origin: Rigo- suits a fort guarding a Roman road, because it came from PIE *reg- ‘to move in a straight line’. The most direct parallel is Latin rigor ‘line, course’, a Roman surveying term best known from the text RIGORE VALI AELI DRACONIS on the Staffordshire Moorlands Pan, but another relative is Latin rigo ‘to lead’, applied primarily to water, like its English descendant irrigate. Claims that rigo- meant ‘royal’ spring from the same misguided impulse as claims that -rix in personal names was exclusively Celtic. About dunum see here.
Last Edited: 16 March 2017