Location and coordinates are for the approximate centre of Dwygyfylchi within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Dwygyfylchi, coast par. and vil., Carnarvonshire, 2½ miles W. of Conway -- par., 3789 ac. land and 2205 water, pop. 2159; vil., pop. 2122.