Síol Muireadaigh, Gaelic-Irish dynasty and territory, located in north County Roscommon.
The Síol Muireadaigh were a dynasty of related clans, all descendants of King Muiredach Muillethan of Connacht (died 702), all of whom lived in north-central Connacht. The term Síol denotes the seed, or descendants, of Muiredach.
Septs of the Síol Muireadaigh included