- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 50°26'11"N 4°42'20"W
- Eastings/Northings: 207956, 63139
- OS Grid: SX079631
- Mapcode Local: GBR N3.PWLK
- Mapcode Global: FRA 171W.SN3
Location and coordinates are for the approximate centre of Trebyan within this administrative area.
Geographic features and populated places may cross administrative borders.