1102 in Ireland

Events from the year 1102 in Ireland.

Incumbents

 * High King of Ireland: Domnall Ua Lochlainn

Events

 * Arnulf de Montgomery, Lord of Pembroke, being banished from England and Wales for joining with his brother in rebellion against Henry I of England, serves his father-in-law, Muirchertach Ua Briain, High King of Ireland; Henry imposes a trade embargo against Ireland.
 * Betrothal of Muirchertach Ua Briain's daughters: Lafracoth to Arnulf de Montgomery and Bjaðmunjo to Sigurd (son of Magnus Barefoot).
 * Archbishop Anselm of Canterbury writes to Muirchertach Ua Briain urging ecclesiastical reform and restoring good relations between him and Henry I of England.
 * Domnall Ua Conchobair becomes King of Connacht

Births

 * Gilla na Naemh Ua Duinn, poet, historian and cleric (died 1160).
 * Approximate date and probable location – Harald IV Gille of Norway (killed 1136).

Deaths

 * Mugrón Ua Morgair, archlector of Armagh.
 * Domnall Ua Ruairc, King of Connacht and Breifne.