Adomnán or Adamnán of Iona (/æðɒvˈnɔːn/, Latin: Adamnanus, Adomnanus; c. 624   704), also known as Eunan (from Irish Naomh Ádhamhnán), was an abbot of Iona Abbey (r. 679–704), hagiographer, statesman, canon jurist, and saint. He was the author of the most important book on the life of his cousin St Columba and the promulgator of the Law of Adomnán or "Law of Innocents" (Latin: Lex Innocentium).

Saint Adomnán of Iona
St. Eunan, Raphoe Cathedral
County Donegal, Ireland
Died704 (aged c. 80)
Iona, Scotland
Venerated inCatholic Church
Eastern Orthodox Church
Scottish Episcopal Church[1]
Feast23 September
PatronageRoman Catholic Diocese of Raphoe


Adomnán was born about 624, a relative on his father's side of Columba.[2] He was the son of Rónán mac Tinne by Ronat, a woman from the Northern Uí Néill lineage known as the Cenél nÉnda. Adomnán's birthplace was probably in or near Raphoe, a town in what later became Tír Chonaill (now mainly County Donegal), in Ulster in the north of Ireland. Some of Adomnán's childhood anecdotes seem to confirm at least an upbringing in this fertile eastern part of present-day County Donegal, not far from the modern city of Derry.

It is thought that Adomnán may have begun his monastic career at a Columban monastery called Druim Tuamma, but any Columban foundation in northern Ireland or Dál Riata is a possibility, although Durrow is a stronger possibility than most. He probably joined the Columban familia (i.e. the federation of monasteries under the leadership of Iona Abbey) around the year 640. Some modern commentators believe that he could not have come to Iona until sometime after the year 669, the year of the accession of Fáilbe mac Pípáin, the first abbot of whom Adomnán gives any information. However, Richard Sharpe argues that he probably came to Iona during the abbacy of Ségéne (d. 652). Whenever or wherever Adomnán received his education, Adomnán attained a level of learning rare in Early Medieval Northern Europe. It has been suggested by Alfred Smyth that Adomnán spent some years teaching and studying at Durrow,[3] and while this is not accepted by all scholars, it remains a strong possibility.

In 679, Adomnán became the ninth abbot of Iona after Columba.[4] Abbot Adomnán enjoyed a friendship with King Aldfrith of Northumbria. In 684, Aldfrith had been staying with Adomnán in Iona. In 686, after the death of Aldfrith's brother King Ecgfrith of Northumbria and Aldfrith's succession to the kingship, Adomnán was in the Kingdom of Northumbria on the request of King Fínsnechta Fledach of Brega in order to gain the freedom of sixty Gaels who had been captured in a Northumbrian raid two years before.[3]

Adomnán, in keeping with Ionan tradition, made several more trips to the lands of the English during his abbacy, including one the following year. It is sometimes thought, after the account given by Bede, that it was during his visits to Northumbria, under the influence of Abbot Ceolfrith, that Adomnán decided to adopt the Roman dating of Easter that had been agreed some years before at the Synod of Whitby. Bede implies that this led to a schism at Iona, whereby Adomnán became alienated from the Iona brethren and went to Ireland to convince the Irish of the Roman dating. Jeffrey Wetherill sees Adomnán's long absences from Iona as having led to something of an undermining of his authority; he was thus unable to persuade the monks to adopt the Roman dating of Easter, let alone the tonsure.[2] It is clear that Adomnán did adopt that Roman dating, and moreover, probably did argue the case for it in Ireland.[4]

Cáin Adomnáin

It is generally believed that in 697, Adomnán promulgated the Cáin Adomnáin, meaning literally the "Canons" or "Law of Adomnán". The Cáin Adomnáin was promulgated amongst a gathering of Irish, Dál Riatan and Pictish notables at the Synod of Birr. It is a set of laws designed, among other things, to guarantee the safety and immunity of various types of non-combatants in warfare. For this reason it is also known as the "Law of Innocents".


Adomnán's most important work, and the one for which he is best known, is the Vita Columbae (i.e. "Life of Columba"), a hagiography of Iona's founder, Saint Columba,[5] probably written between 697 and 700. The format borrows to some extent from Sulpicius Severus' Life of Saint Martin of Tours.[6] Adomnán adapted traditional forms of Christian biography to group stories about Columba thematically rather than chronologically,[7] and present Columba as comparable to a hero in Gaelic mythology.[8] Wetherill suggests that one of the motivations for writing the Vita was to offer Columba as a model for the monks, and thereby improve Adomnán's standing as abbot.[2] The biography is by far the most important surviving work written in early medieval Scotland, and is a vital source for our knowledge of the Picts, as well as a great insight into the life of Iona and the early medieval Gaelic monk.

However, the Vita was not his only work. Adomnán also wrote the treatise De Locis Sanctis (i.e. "On Holy Places"), an account of the great Christian holy places and centres of pilgrimage. Adomnán got much of his information from a Frankish bishop called Arculf, who had personally visited the Egypt, Rome, Constantinople and the Holy Land, and visited Iona afterwards. Adomnán gave a copy to the scholar-king Aldfrith of Northumbria (685-704).[3] Also attributed to him is a good deal of Gaelic poetry, including a celebration of the Pictish King Bridei's (671-93) victory over the Northumbrians at the Battle of Dun Nechtain (685).


Adomnán died in 704, and became a saint in Scottish and Irish tradition, as well as one of the most important figures in either Scottish or Irish history. His death and feast day are commemorated on 23 September. Along with St. Columba, he is joint patron of the Diocese of Raphoe, which encompasses the bulk of County Donegal in the north west of Ireland. The Cathedral of St. Eunan and St. Columba (popularly known as St. Eunan's Cathedral), the Catholic cathedral in that diocese, is in Letterkenny.


In his native Donegal, the saint has given his name to several institutions and buildings including:

In Co. Sligo, just to the south, he is venerated as the founder of Skreen Abbey, now the site of the C. of I. church of Skreen Parish.

See also



  • Reeves, William, and James Henthorn Todd (eds.). Vita Sancta Columbae: The life of St Columba founder of Hy, written by Adamnan, ninth Abbot of Iona. Dublin: Dublin University Press for the Irish Archaeological and Celtic Association, 1857. Available from CELT
  • Sharpe, Richard (tr.). Adomnán of Iona: Life of St. Columba. London, 1995. (43-65)
  • Smyth, Alfred P. (1984). Warlords and Holy Men: Scotland AD 80–1000. Edinburgh: Edinburgh University Press. ISBN 0-7486-0100-7.

Further reading

Primary sources

  • Adomnán, Vita Columbae:
    • Anderson, A.O. and M.O. Anderson (eds. and trs.). Adomnán's Life of Columba. 2nd ed. Oxford, 1991. First edition: Edinburgh, 1961.
    • Sharpe, Richard (tr.). Adomnán of Iona: Life of St. Columba. London, 1995. (43-65)
    • Reeves, William, and James Henthorn Todd (eds.). Vita Sancta Columbae: The life of St Columba founder of Hy, written by Adamnan, ninth Abbot of Iona. Dublin: Dublin University Press for the Irish Archaeological and Celtic Association, 1857. Available from CELT
  • Cáin Adamnáin ("The Law of Adomnán") or Lex Innocentium ("Law of the Innocents")
    • Márkus, Gilbert (tr.), Adomnán's Law of the Innocents - Cáin Adomnáin: A seventh-century law for the protection of non-combatants. Kilmartin, Argyll: Kilmartin House Museum, 2008. ISBN 978-0-9533674-3-6
    • Meyer, Kuno (ed.). Cain Adamnain: An Old Irish Treatise on the Law of Adamnan. Oxford: Clarendon Press, 1905.
    • Ní Dhonnchadha, Máirín (tr.). "The Law of Adomnán: A Translation." Adomnan at Birr, AD 697: Essays in Commemoration of the Law of the Innocents, ed. Thomas O’Louglin. Dublin: Four Courts Press, 2001. 53-68. Translation of §§ 28-53.
  • Adomnán, De Locis Sanctis
    • Meehan, D. (ed.). Adomnan's 'De Locis Sanctis'. Scriptores Latini Hiberniae 3. Dublin, 1958. 1–34.
  • Anonymous, Betha Adamnáin ("The Life of Adomnán")
    • Herbert, Maire and Padraig Ó Riain (eds. and trs.). Betha Adamnáin: The Irish Life of Adamnán. Irish Texts Society 54. 1988. 1-44.
  • Anonymous, Fís Adomnáin ("The Vision of Adomnán"), 10-11th century.
    • Windisch, Ernst (ed.). "Fís Adamnáin." Irische Texte 1 (1880). 165-96.
    • Stokes, W. (ed. and tr.). Fis Adomnáin. Simla, 1870.
    • Carey, John (tr.). King of Mysteries: Early Irish Religious Writings. Dublin: Four Courts Press, 1998. 263-74.

Secondary sources

  • Herbert, M. Iona, Kells, and Derry: the history and hagiography of the monastic familia of Columba. 1988.
  • O'Loughlin, T. "The Exegetical Purpose of Adomnán’s De Locis Sanctis", Cambridge Medieval Celtic Studies 24(1992)37-53.
  • O'Loughlin, T. "The Library of Iona in the Late Seventh Century: The Evidence from Adomnán’s De locis sanctis", Ériu 45(1994)33-52
  • O'Loughlin, T."The View from Iona: Adomnán’s mental maps", Peritia 10(1996)98-122
  • O'Loughlin, T. "Res, tempus, locus, persona: Adomnán’s Exegetical Method", Innes Review 48(1997)95-111; re-printed in: D. Broun and T.O. Clancy eds, Spes Scotorum Hope of the Scots: Saint Columba, Iona and Scotland (T. and T. Clark, Edinburgh 1999), pp. 139–158.
  • O'Loughlin, T. "Adomnán and Arculf: The Case of an Expert Witness", Journal of Medieval Latin 7(1997)127-146
  • O'Loughlin, T. "Adomnán: A Man of Many Parts" in T. O’Loughlin ed., Adomnán at Birr, AD 697: Essays in Commemoration of the Law of the Innocents (Four Courts Press, Dublin 2001), pp. 41–51.
  • O'Loughlin, T. "The Tombs of the Saints: their significance for Adomnán", in J. Carey, M. Herbert and P. Ó Riain eds, Studies in Irish Hagiography: Saints and Scholars (Four Courts Press, Dublin 2001), pp. 1–14.

Further reading

  • Adomnán at Birr, AD 697: Essays in Commemoration of the Law of the Innocents. Edited by Thomas O'Loughlin. (Dublin: Four Courts Press, 2001)
Preceded by
Abbot of Iona
Succeeded by
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