Tadhg mac Muirchertach was one of the early kings of

Moylurg {{Use dmy dates, date=April 2022 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 ...

, 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 Muirchertach mac Maelruanaidh Mor was the second king of Moylurg {{Use dmy dates, date=April 2022 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. ...

. He was succeeded by his son,

Maelruanaidh mac Tadhg Maelruanaidh mac Tadhg was the fourth king of Moylurg, and reigned sometime in the late 11th (and possibly into the early 12th) century. The only date associated with his reign, 1080, may simply be provisional. References * "Mac Dermot of M ...

, in or around the year 1080, though this too is an educated guess.

References

* "Mac Dermot of Moylurg: The Story of a Connacht Family", Dermot Mac Dermot, 1996. * http://www.macdermot.com/ Connachta 11th-century Irish monarchs People from County Roscommon MacDermot family {{Ireland-royal-stub