Saint-Paul-Trois-Châteaux
Saint-Paul-Trois-Châteaux, sometimes known as -en-Tricastin, is a commune, an administrative region, in the Drôme department in southeastern France.
Name
The settlement is attested as Augusta Tricastinorum, Trikastinoi ōn polis Noiomagos, Sancti Pauli vel Sancti Restituti Trigastinensi, in Tricastrinensi, civitate Tricastrina, San Paul, Sanctum Paulum Tricastinensem, and Sainct Pol Trois Chasteaux.The toponym derives from the name of the ancient Gallic tribe that dwelled in the region, the Tricastini. The insertion of an epenthetic r that changed Tricastini to Tricastrini, which is attested by the 12th century, caused a semantic reinterpretation of the name, leading eventually to the modern French Trois-Châteaux, meaning 'three-castles'.