The ancient parish comprised the townships of Eyarth, Garthgynan, Derwen-Llanerch and Faenol.
The church was mentioned in the Norwich Taxation of 1254. It was restored in 1872, being re-opened on 8 August 1872.
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For family history information about the church and parish, visit the GenUKI Llanfair Dyffryn Clwyd page.