Muirchertach mac Maelruanaidh Mor was the second king of Moylurg, but is very obscure; not even the dates of his reign are known. He was succeeded by his son Tadhg.
Hugh Hyacinth O'Rorke MacDermot, Prince of Coolavin PC, JP, DL, QC, was an Irish lawyer.
Conchobar mac Tadg, King of Connacht 967–973 and eponym of the O'Conor family of Connacht.
The Kings of Magh Luirg or Moylurg were a branch of the Síol Muireadaigh, and a kindred family to the Ua Conchobair Kings of Connacht. Their ancestor, Maelruanaidh Mor mac Tadg, was a brother to Conchobar mac Tadg, King of Connacht 967–973, ancestor of the O Connor family of Connacht. Maelruanaidh Mor mac Tadg is said to have made a deal of some nature where, in return for abandoning any claim to the provincial kingship, he would be given Moylurg. His dynasty was known as the Clan Mulrooney, and later still took the surname of MacDermot. The following is a list of their Kings, followed by the respective heads of the family up to the present day.
Rory na-bhFeadh mac Donough Ua Conchobair, King of Connacht 1316–1317.
Magh Luirg or Magh Luirg an Dagda, Anglicised as Moylurg, was the name of a medieval Irish kingdom located in modern-day County Roscommon, Ireland. It was a sub-kingdom of the kingdom of Connacht from c. 956–1585. The kings of Moylurg were a branch of the Síl Muiredaig, who were themselves of the Uí Briúin Ai who descended from the Connachta.
Maelruanaidh Mor mac Tadg, first King of Moylurg, and ancestor to all subsequent Kings of Moylurg. He is usually assumed to have lived in or about the year 956.
Tadhg mac Muirchertach was one of the early kings of Moylurg, and the most obscure. Even the years of his reign are unknown. All that can be said with certainty is that he lived in the middle decades of the eleventh century and his father was Muirchertach mac Maelruanaidh Mor. He was succeeded by his son, Maelruanaidh mac Tadhg, in or around the year 1080, though this too is an educated guess.
Maelruanaidh mac Tadhg was the fourth king of Moylurg, and reigned sometime in the late 11th century. The only date associated with his reign, 1080, may simply be provisional.
Tadhg Mor mac Maelruanaidh was a fifth king of Moylurg.
Dermot mac Tadhg Mor, 7th king of Moylurg, reigned from 1124 to 1159. Vassal and kinsman of the O Conchobhair Kings of Connacht. Dermot was the progenitor of the MacDermot family, as well as its offshoot septs such as MacDermot Roe, McDonagh, and Crowley (surname).
Prince of Coolavin was a title first applied by popular usage to Charles MacDermot, 1707–1758, then head of the MacDermot family of Moylurg. Coolavin is a barony in south County Sligo in Ireland. Up to the late 16th century the head of the family were still Kings of Moylurg, but had lost their lands due to confiscation.
Sir Dermot MacDermot (1906–1989), styled Prince of Coolavin, Chief of the Name, head of the MacDermot clan, and a descendant of the Kings of Moylurg.
Cormac MacDermot was a 13th-century Irish ruler who was King of Moylurg, reigning 1218–44.
MacDermot Roe is the name of a sept of the MacDermot Kings of Moylurg.
Tomaltach na Cairge MacDermot was the King of Moylurg from 1197 until his death in 1207.
Muirgius mac Tadhg More was the eighth king of Moylurg, who reigned from 1159 to 1187, and was brother of the previous king. The Annals of the Four Masters record his death in the latter year with the comment: "Mac Dermot, Lord of Moylurg, died in his own mansion on Claenlough, in Clann-Chuain."
Conchobar mac Diarmata, was the ninth king of Moylurg, reigning 1187 to 1196.
Mac Diarmada, also spelled Mac Diarmata, is an Irish surname, and the surname of the ruling dynasty of Moylurg, a kingdom that existed in Connacht from the 10th to 16th centuries. The last ruling king was Tadhg mac Diarmata, who ruled until 1585. In 2021, Paul McDermott of Tuam, Co. Galway became the Prince of Coolavin, the new head of the family. A step of the McDermott's MacDermot Roe became high sheriff of Roscommon.
The Annals of Loch Cé cover events, mainly in Connacht and its neighbouring regions, from 1014 to 1590. It takes its name from Lough Cé in the kingdom of Moylurg - now north County Roscommon - which was the centre of power of the Clan MacDermot. In the sixteenth century, the king Brian MacDermot, commissioned the Annals of Loch Ce, which remain among the most important written records of medieval Irish history. For its earliest centuries it used the Annals of Boyle.
Máeleoin Bódur Ó Maolconaire was a member of the Ó Maolconaire family of Connacht, who served as historians and poets to the Síol Muireadaigh, and their rulers, the Ó Conchubhair Kings of Connacht. He is the second of the family listed as the Ollamh Síol Muireadaigh, and died in 1266.