Denis O'Miachain (also recorded as Tomás Ó Miadacháin) was Archdeacon of Achonry until 1266,"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 4" Cotton, H. p107. Dublin, Hodges & Smith, 1848–1878 when he was consecrated Bishop of Achonry;"A New History of Ireland" T. W. Moody, F. X. Martin, F.J. Byrne and Cosgrove, A: Oxford, OUP, 1976 he died in 1285."Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 4" Cotton, H. p99. Dublin, Hodges & Smith, 1848–1878
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