LLANBADRIG, a parish in the district and county of Anglesey; on the coast at Cemmaes bay, 4½ miles W by N of Amlwch r. station. It contains the townships of Cemmaes and Clygyrog, the former of which has a postoffice under Amlwch. Acres, 4,097. Real property, £1,460. Pop. in 1851,1,281; in 1861,1,187. Houses, 296. The property is subdivided. Ynys-Badrig, or Mouse-rock, lies off the coast. The rocks include marble, limestone, and serpentine. The living is a vicarage in the diocese of Bangor. Value, £169. Patron, the Lord Chancellor. The old church stands on a cliff, overlooking the sea; is an ancient structure, in good condition; succeeded one which is said to have been founded by St. Patrick, on his way to Ireland; and is still used for marriages and burials. The new church stands in the village of Cemmaes, and was built in 1864. There are two Independent chapels, two Calvinistic Methodist chapels, an endowed school with £24 a year, and other charities £11.

(John Marius Wilson, Imperial Gazetteer of England and Wales (1870-72))