- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°14'40"N 4°36'45"W
- Eastings/Northings: 225760, 375125
- OS Grid: SH257751
- Mapcode Local: GBR GNZ3.XH6
- Mapcode Global: WH42P.3QQ2
Location and coordinates are for the approximate centre of Maen-y-frân within this administrative area.
Geographic features and populated places may cross administrative borders.