The Kings of Magh Luirg or Moylurg were a branch of the Síol Muireadaigh, and a kindred family to the Ua ConchobairKings 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 early modern period.
Ruaidri mac Diarmata, 1549–1568 - A school invitation was given by Mac Diarmada, i.e. Ruaidhri, at Christmas of this year; and it is not possible to count or over-reckon all that he gave to the poets, and professors, and learned men of Erinn, and to all men besides.
Turlough mac Diarmata, 1568–1576.
Tadhg mac Diarmata, 1576–1585, last de facto King of Moylurg.
The MacDermot of the Carrick
Brian na Carriag MacDermot, 1585–1595, first to be styled "MacDermot of the Carrick"
Conchobar Óg MacDermot, 1595–1603.
Brian Óg MacDermot, 1603–1636.
The Chief of the Name
Turlough MacDermot, 1636 – c.1652, first to be styled Chief of the name.
