Treworlas is a hamlet west of Veryan, Cornwall, England, United Kingdom, part of the civil parish of Philleigh.Ordnance Survey One-inch Map of Great Britain; Truro and Falmouth, sheet 190. 1961
Henry Jenner suggested that Treworlas was named after Gorlois, the legendary duke of Cornwall, who he believed was a real fifth or sixth century figure, either a petty chief who was a vassal of the Royal House of Dumnonia, or – if the leaders of the Britons that had been displaced from the rest of England by the Saxons had become the kings of Dumnonia – Gorlois may have been of the line of the original chiefs of the Dumnonii that had been supplanted by these displaced Britons.
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