Lord of Ireland

Monarchical systems of government have existed in Ireland from ancient times. In most of Ireland, this continued until 1949, when it transitioned to being the Republic of Ireland. Northern Ireland, as part of the United Kingdom, remains under a monarchical system 

 Máel Sechnaill mac Máele Ruanaid, 846–860
 Áed Findliath, 861–876
 Flann Sinna, 877–914
 Niall Glúndub, 915–917
 Donnchad Donn, 918–942
 Congalach Cnogba, 943–954
 Domnall ua Néill, 955–978
 Máel Sechnaill mac Domnaill, 979–1002 and 1014–1022
 Brian Boru, 1002–1014
 Donnchad mac Briain, died 1064
 Diarmait mac Máel na mBó, died 1072
 Toirdelbach Ua Briain, died 1086
 Muirchertach Ua Briain, died 1119
 Domnall Ua Lochlainn, died 1121
 Toirdelbach Ua Conchobair, c.1119-1156
 Muirchertach Mac Lochlainn, c.1156-1166
 Ruaidrí Ua Conchobair, 1166-1198
 Ruaidrí Ua Conchobair  1166 – 1198

 Aodh Méith mac Aodha O'Neill  1196–1230
 Brian O'Neill 1230– 1260
 Hugh Boy O'Neill  1260–1283
 Niall Culanach O'Neill 1283-1290
 Domhnall O'Neilln 1290-1325
 Brian O'Neill 1291–1295
 Henry O'Neill 1325–1345  
 1345-1498
 Domhnall Clarach O'Neill 1498–1509
 Art Oge O'Neill 1513–1519
 Conn Bacagh O'Neill 1519–1558
 Shane O'Neill 1559–1567
 Turlough Luineach O'Neill 1567–1593
 Hugh O'Neill 1593–1607.         After that the British controlled it      see:List of English monarchs

Category:History of Ireland