Gilla Mo Dutu Úa Caiside

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Gilla Mo Dutu Úa Caiside (fl. 1147) was a Gaelic Irish poet.


Closely associated with Tighearnán Ua Ruairc, King of Bréifne, he was attached to the monastery of Daminis, and possibly to the church of Ard Brecáin, apparently been a cleric.

His two famous compositions are Éri óg inis na náem and the Banshenchas.

The Ó Caiside family later became – from the 14th century – prominent in Fermanagh, and many of them became hereditary doctors to the Maguire chieftains.

His known compositions are:

  • Éri óg inis na náem
  • The Banshenchas (Ádam óenathair na ndóene)
  • Eight poems in the lives of St. Mo Laisse and M'Áedóc
    • Ca lion mionn ag Maodhócc
    • Cert Maodhócc ar shluagh Mhancach
    • Comhroinn Maodhócc, fa mór modh
    • Eittirbretha Maodhócc min
    • Uasal an mac, mac Setna
    • Cia is fearr cairt ar dháil mláisi
    • Cia thairngir mlaisi ria theacht
    • Molaisi eolach na heagna
  • Cuibdea comanmann na rig
  • Sé rígh déag Eoghain anall


  • The Prose Banshenchas, unpublished Ph.D. Dissertation, UCG, 1980.
  • The Manuscript Tradition of the Banshenchas, Éiru 33 (1982) 109-35
  • An Bansheanchas, Léachtaí Cholm Cille xii: Na mná sa litríocht, eag. P. Ó Fiannachta (Maigh Nuad, 1982), 5-29.
  • Gilla Mo Dutu Úa Caiside, by Kevin Murray, in Cín Chille Cúile, ed. J. Carey, M. Herbert and K. Murray (Aberystwyth: Celtic Studies Publications, 2004), 150-162.

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