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 Moylurg: The Story of a Connacht Family", Dermot Mac Dermot, 1996. * {{DEFAULTSORT:Maelruanaidh Mac Tadhg Kings of Connacht 11th-century Irish monarchs People from County Roscommon MacDermot family