Thomas O'Carroll was a 14th-century Roman Catholic priest in Ireland."A New History of Ireland" T. W. Moody, F. X. Martin, F.J. Byrne and Cosgrove, A: Oxford, OUP, 1976
MacCearbhaill was Archdeacon of Cashel until 1365"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 1" Cotton, H. p53 Dublin, Hodges & Smith, 1848–1878 when he became Archbishop of Tuam."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 4" Cotton, H. p8 Dublin, Hodges & Smith, 1848–1878 In 1365 Pope Urban V translated him to Cashel."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 1" Cotton, H. p8 8/9 Dublin, Hodges & Smith, 1848–1878 He died on 8 February 1373.
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