John was an Irish priest in the Diocese of Ardfert and Aghadoe in the 13th-century: he is recorded as Archdeacon of Ardfert in 1664;"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 1" Cotton, H. pp50 Dublin, Hodges & Smith, 1848-1878 and as Bishop of Ardfert and Aghadoe from 1265 until his death in 1286.

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