Between the sixth to sixteenth centuries, The Kingdom of Airgíalla

Airgíalla

Airgíalla or Airgialla was the name of an Irish federation and Irish kingdom which first formed around the 7th century...

 (Oriel in English) was one of the three major kingdoms that formed what is now the province of Ulster

Ulster

Ulster is one of the four provinces of Ireland, located in the north of the island. In ancient Ireland, it was one of the fifths ruled by a "king of over-kings" . Following the Norman invasion of Ireland, the ancient kingdoms were shired into a number of counties for administrative and judicial...

. The others were In Tuisceairt to the west, and Ulaid

Ulaid

The Ulaid or Ulaidh were a people of early Ireland who gave their name to the modern province of Ulster...

 to the east.

Originally a confederation

Confederation

A confederation in modern political terms is a permanent union of political units for common action in relation to other units. Usually created by treaty but often later adopting a common constitution, confederations tend to be established for dealing with critical issues such as defense, foreign...

 comprising some nine different, mainly unrelated peoples, its kings were from a number of different dynasties. There were times when there was no one supreme king of Oriel or Airgialla, two or more kings ruling portions of the kingdom. They have not been included on this list.

Early historic era, c. 513-882

• Colga mac Loite mac Cruinn, died 513
  513
  Year 513 was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Probus and Clementinus...
  
  
• Cairpre Daim Argat, died 514
• Bec mac Cuanu, died 594
• Aed mac Colgan, died 606
• Mael Odhar Macha, died 636
• Dunchad mac Ultan, died 677 ?
• Mael Fothartaig mac Mael Dubh, alive 697
• Cu Masach mac Cathal, died 825
• Gofraidh mac Fearghus, fl. 835
• Foghartaigh mac Mael Breasal, died 850/852
• Congalach mac Finnachta, died 874
• Mael Padraig mac Mael Curarada, died 882
  882
  Year 882 was a common year starting on Monday of the Julian calendar.- Europe :* Carloman, King of the West Franks, becomes sole king upon the death of his brother....
  
  

High Medieval Kings, c. 900-1201

• Maol Craoibh ua Duibh Sionach, died 917
  917
  Year 917 was a common year starting on Wednesday of the Julian calendar.- Asia :* The Great Yue Kingdom, later renamed Southern Han, is founded by Liu Yan in Guangdong and Guangxi.- Europe :...
  
  
• Fogarthach mac Donnegan, died 947
  947
  Year 947 was a common year starting on Friday of the Julian calendar.- Asia :* The Later Jin Dynasty falls to the Later Han Dynasty in China....
  
  
• Donnacan mac Maelmuire, died 970
  970
  Year 970 was a common year starting on Saturday of the Julian calendar.- Europe :* A devastating decade-long famine begins in France....
  
  
• Mac Eiccnigh mac Dalagh, died 998
  998
  Year 998 was a common year starting on Saturday of the Julian calendar.- Europe :* Otto III retakes the city of Rome and reinstates his cousin, Pope Gregory V, after mutilating and blinding his rival, Antipope John XVI.* St...
  
  
• Mac Leiginn mac Cerbaill, died 1022
• Cathalan Ua Crichain, died 1027
• Gilla Coluim ua Eichnech, died 1048
• Leathlobair Ua Laidhgnen, died 1053
• Leathlobair Ua Laidhgnen, died 1078
• Ua Baoigheallain, died 1087
• Aodh Ua Baoigheallain, died 1093
• Ua Ainbhigh, died 1094
• Cu Caishil Ua Cerbaill, died 1101
• Giolla Crist Ua hEiccnigh, died 1127
• Donnchadh Ua Cearbaill
  Donnchadh Ua Cearbaill
  Donnchad Ua Cerbaill or Donnchadh Ó Cearbhaill, King of Airgíalla, fl. 1130's.Ua Cerbaill was a supporter of the Irish religious reform movement of the 11th century. He was a close associate of Saint Malachy , and with him founded Mellifont Abbey. He was also responsible for foundations by the...
  
  , 1130-1168/1169
• Murchard Ua Cerbaill, 1168-1189
• Muirchertach, 1189-1194
• ?, died 1196
• Ua Eichnigh, died 1201

Late Medieval rulers, c.1201–1590

• Niall mac Donnchada, fl. 1196-1208
• Donnchad Ó hAnluain
• Ardghal Ó hAnluain
• Gilla Patraig Ó hAnluain
• Murchadh Ó hAnluain
• Cu Uladh Ó hAnluain
• Eachmarcach Ó hAnluain
• Cu Ulad Ó hAnluain
• Niall Ó hAnluain
• Magnus Ó hAnluain
• Niall Ó hAnluain
• Eochaid mac Mathgahamna mac Neill, died 1273
• Brian mac Eochada, 1283–1311
• Ralph/Roolb mac Eochada, 1311–1314
• Mael Sechlainn mac Eochada, 1314–?
• Murchad Mór mac Briain, ?–1331
• Seoan mac Maoilsheachlainn, 1331–1342
• Aodh mac Roolb, 1342–1344
• Murchadh Óg mac Murchada, 1344–1344
• Maghnus mac Eochadha, 1344–1357
• Pilib mac Rooilbh, 1357–1362
• Brian Mór mac Aodh, 1362–1365
• Niall mac Murchadha, 1365–1368
• Brian Mór mac Aodh, 1368–1371
• Pilib Ruadh mac Briain, 1371–1403
• Ardghal mac Briain, 1403–February 1416
• Brian mac Ardghail, 1416–1442
• Ruaidhri mac Ardghail, 1442–1446
• Aodh Ruadh mac Ruaidhri, 1446–31 March 1453
• Feidhlimidh mac Briain, 1453–1466
• Eochan mac Ruaidhri, 1466–1467
• Reamonn mac Ruaidhri, 1467–November 1484
• Aodh Óg mac Aodha Ruaidh, 1485–16 September 1496
• Brian mac Reamoinn, 1496–1497
• Rossa mac Maghnusa, 1497–1513
• Reamonn mac Glaisne, 1513–c.1 April 1521
• Glaisne Óg mac Reamoinn, 1521–1551?
• Art Maol mac Reamoinn, 1551–1560
• Aodh mac Briain, 1560–1562
• Art Ruadh mac Briain, 1562–1578
• Sir Rossa Buidhe mac Airt, 1579–August 1589
• Aodh Ruadh mac Airt, 1589–September/October 1590.