Kings of Magh Luirg
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 (a branch of this family were in turn called MacDermot Roe). The following is a list of their Kings, followed by the respective heads of the family up to the present day.
The Kings of Moylurg
Maelruanaidh Mor mac Tadg, fl. 956 founder of Moylurg and the Clan Maelruanaidh.
Muirchertach mac Maelruanaidh Mor
Tadhg mac Muirchertach
Maelruanaidh mac Tadhg, fl. 1080.
Tadhg Mor mac Maelruanaidh, 1120–1124.
Maelsechlainn mac Tadhg Mor, 1124.
Dermot mac Tadhg Mor, 1124–1159, progenitor of the surname MacDermot.