kingdom · British Isles

Kingdom of Eile

450 CE – 1552 CE (approx.) · capital Birr

Irish kingdom of the O'Carrolls around Birr, on the border of Munster and Leinster, which survived as Ely O'Carroll until the 16th century.

Origins

Éile was the territory of an early medieval people of the Irish midlands, in what is now south Offaly and north Tipperary, counted as part of the Kingdom of Munster. Its ruling family claimed descent from the Eóganachta's kin, and from the 11th century the Ua Cerbaill, O'Carroll, became the dominant line, giving the region its later name of Ely O'Carroll.

Rule and society

The kingdom lay on the boundary between Munster and Leinster, which gave it strategic value and exposed it to raids. The monastery of Birr, founded by St Brendan of Birr in the 6th century, produced the Book of MacRegol, an illuminated gospel book of about 800. The O'Carrolls ruled from strongholds such as Leap Castle and Birr.

Decline and legacy

Anglo-Norman settlers took part of the territory in the 13th century, but the O'Carrolls recovered much of it. In 1552 their chief Tadhg O'Carroll surrendered his lands to the crown and was created Baron of Ely, and the region was later divided between King's County and Tipperary.

Lineage

Kingdom of EileKingdom of Ireland 1542 CE – 1800 CE

Connections (1)

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

Last reviewed October 2026Random state ↻