Ailbhe Mac Shamhráin (31 August 1954 – 29 June 2011)^[1] was an Irishmedieval historian andcelticist.

Mac Shamhráin studied atUniversity College Dublin andTrinity College Dublin. He was then aresearch associate at Scoil an Léinn Cheiltigh,NUI Maynooth. Previously, he taught earlyIrish history & settlement studies at Trinity,St. Patrick's College Drumcondra, and NUI Maynooth, where he lectured on the Medieval Irish Studies Programme at the Department ofOld andMiddle Irish. Prior to that, he taught History andIrish atBelcamp College Secondary School.^[2]

In recent years, Mac Shamhráin has led and managed the Monasticon Hibernicum Project (funded by theIrish Research Council for theHumanities andSocial Sciences). Hisdatabase ofEarly ChristianEcclesiastical Settlement inIreland from the 5th to the 12th centuries was publishedonline in 2009. He has also published a number of papers on earlyIrish political andecclesiastical history, and has contributed over 300 entries to theDictionary of Irish Biography.^[3] Mac Shamhráin died in Dublin on 29 June 2011, after a long illness. He continued to write throughout, and completed his final article in hospital on the day of his death.^[4]

• Prosopographica Glindelachensis: theMonastic Church ofGlendalough and its Community, Sixth to Thirteenth Centuries, inJournal of the Royal Society of Antiquaries of Ireland, No. 119, pp. 82–84. 1989.
• The Uí Muiredaig and theAbbey of Glendalough in the Eleventh to Thirteenth Centuries, inCambrian Medieval Celtic Studies, No. 25, pp. 55–75. 1993.
• Church and Polity in Pre-Norman Ireland, May 1996.
• "Nebulae discutiuntur"? The Emergence ofClann Cholmáin, Sixth - Eighth Centuries, pp. 83–97, in Alfred P. Smyth (ed.),Seanchas: Studies in Early and Medieval Irish Archaeology, History and Literature in Honour of Francis J. Byrne. Dublin: Four Courts, 2000.ISBN 978-1-85182-489-2
• TheVikings: an Illustrated History, Dublin, 2002.
• The Island ofSt. Patrick: Church and RulingDynasties in Fingal and Meath, 400-1148, (ed.) Dublin: Four Courts, 2004
  • An Ecclesiastical Enclosure in the Townland of Grange,parish of Holmpatrick, ibid, pp. 52–60
  • Church and Dynasty in Early ChristianBrega: Lusk, Inis Pátraic and the Cast of Máel-Finnia, King and Saint, ibid, pp. 125–39.
• Database of Early Christian Ecclesiastical Settlement in Ireland 5th - 12th Centuries (with N. White & A. Breen)Dublin Institute for Advanced Studies (DIAS) 2009[1]

• List of contributors,The Island of St. Patrick ..., p. 180, 2004

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