Domhnall MacLochlainn was the High King of Ireland between 1083 and 1121. At first, his position existed in oppisition to the rule of Toirdhealbhach Ua Briain until the reign of Briain ended in 1086. However, a follower of Toirdhealbhach, Muircheartach Ua Briain, moved to oppose the rule of MacLochlainn between 1101 and 1119. The office of High King of Ireland (Irish: Ard Rí Érenn) was in origin a pseudohistorical construct of the eighth century that placed a king of all Ireland atop the fragmented pyramid of kingship that actually existed at that time. ... Events Sancho I of Aragon conqueres Graus. ... Events Concordat of Worms condemns Pierre Abélards writings on the Holy Trinity. ... Events Domesday Book is completed in England Emperor Shirakawa of Japan starts his cloistered rule Imam Ali Mosque is rebuilt by the Seljuk Malik Shah I after being destroyed by fire. ... Events A second wave of crusaders arrives in the newly established Kingdom of Jerusalem, after being heavily defeated by Kilij Arslan I at Heraclia. ... Events February 2 - Callixtus II becomes Pope August 20 - Henry I of England routes Louis VI at the Battle of Bremule. ...
The office survived in titular form attached to a chief tenancy in these episcopal lands held by right of descent within a family and the holders of the office retained a sense of being ecclesiastics in minor orders, an obligation to provide hospitality to travellers and a fluency in Latin [2].
An English survey of 1607 preliminary to the disposession of the Catholic dioceses of western Ulster records a Cornelius and a Donatus MacLochlainn as erenaghs of lands in Grallagh to the east of Trawbreaga bay on the north coast of Inishowen [3].
The same inquisition records a Maghnus MacLochlainn as erenagh of lands in Moville and he can readily be identified in the genealogy as Maghnus of paragraph 334.
Domhnall V, MacLochlainn (son of Ardghal) became Ard Righ of Ireland.
Domhnall Mac Lochlainn, Lord of Cineal Eoghain (grandson of King Muircheartach III) and nine of his kinsmen slain in battle by Bryan O'Neill and Melaghlin O'Donnell, after which the Maclochlainn's ceased to rule in Inishowen.
Domhnall O'Dochartaigh, High Chief of Ard Midhair, died.