Location and coordinates are for the approximate centre of Brithdir within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Brithdir.-- hamlet, Gelligaer par., on E. border of Glamorgan, 8 miles SE. of Merthyr-Tydfil; collieries and iron-works are in vicinity.