Thomond’s August Succession
Archived: 24 October 2026
Abstract
1287 in Ireland was marked by succession, local violence and deaths without island-wide upheaval. Thomas de Clare, lord of Thomond, died on 29 August, leaving his six-year-old heir Gilbert and placing lands under wardship. His death altered but did not end contested power around the Shannon; Toirrdelbach Ó Briain later raided Ormond and Limerick. In Connacht, Diarmait Midech Mac Diarmata and Gilla na nÉc Ó Mannacháin died alongside lesser rulers and clerics. Archdeacon Florint Ó Gibealláin was praised for learning. Máel Sechlainn Mag Oirechtaig was killed in revenge for broken loyalty. Misdated de Burgh campaigns belong to 1291, not 1287.