kingdom · British Isles

Kingdom of Moylurg

1100 CE – 1585 CE (approx.) · capital Rock of Lough Ce

A Gaelic lordship of north Roscommon ruled by the MacDermots from their island fortress on Lough Key.

Origins

Magh Luirg was the territory of a branch of the Sil Muiredaig, the ruling kindred of Connacht. In the 12th century the MacDermot family, descended from Diarmait mac Taidg, emerged as its rulers and as marshals of the O'Connor kings of Connacht.

Rule and society

The MacDermots ruled from the Rock of Lough Ce, an island fortress on Lough Key, and patronised the abbey of Boyle and the learned families who compiled the Annals of Loch Ce. Their lordship was based on cattle, clients and armed retainers, and they served as kingmakers in Connacht politics.

Decline and legacy

The Composition of Connacht in 1585 brought the lordship under English land law. The MacDermots kept part of their lands and their title, the MacDermot, Prince of Coolavin, has been recognised into modern times.

Lineage

Kingdom of MoylurgKingdom of Ireland 1542 CE – 1800 CE

Connections (1)

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Cite this page
APA
The Epoch Institute. (2026). Kingdom of Moylurg. In The Epoch Institute States Register. https://the-epoch-institute.org/state/kingdom-of-moylurg
MLA
“Kingdom of Moylurg.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/kingdom-of-moylurg. Accessed .
Chicago
The Epoch Institute. “Kingdom of Moylurg.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/kingdom-of-moylurg.
Harvard
The Epoch Institute (2026) ‘Kingdom of Moylurg’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/kingdom-of-moylurg (Accessed: ).

Last reviewed October 2026Random state ↻