Tir Ollíol was a

túath ''Túath'' (plural ''túatha'') is the Old Irish term for the basic political and jurisdictional unit of Gaelic Ireland. ''Túath'' can refer to both a geographical territory as well the people who lived in that territory. The smallest ''túath ...

in northwest

Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...

. It was part of the

confederation A confederation (also known as a confederacy or league) is a political union of sovereign states united for purposes of common action. Usually created by a treaty, confederations of states tend to be established for dealing with critical issu ...

of Iochtar Connacht until the late 16th century. Its name is preserved by the

barony Barony may refer to: * Barony, the peerage, office of, or territory held by a baron * Barony, the title and land held in fealty by a feudal baron * Barony (county division), a type of administrative or geographical division in parts of the British ...

of Tirerril in southeast

County Sligo County Sligo ( , ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Northern and Western Region and is part of the Provinces of Ireland, province of Connacht. Sligo is the administrative capital and largest town in ...

. It is named after Olliol, one of the sons of Eochaid Mugmedon and half brother of

Niall of the Nine Hostages Niall Noígíallach (; Old Irish "having nine hostages"), or Niall of the Nine Hostages, was a legendary, semi-historical Irish king who was the ancestor of the Uí Néill dynasties that dominated Ireland from the 6th to the 10th centuries. ...

, from whom descended the Uí Ailello, a branch of the early Irish dynasty known as the

Connachta The Connachta are a group of medieval Irish dynasty, dynasties who claimed descent from the legendary High King of Ireland, High King Conn of the Hundred Battles, Conn Cétchathach (Conn of the Hundred Battles). The modern western Provinces of ...

History

The Uí Aillelo dynasty sank into obscurity at an early date. but the name is preserved as the tuath of Tir Ollíol (Tirerril). The Lords of Tir Olioll were Mac Donnchadha of the Uí Briúin Aí a branch of the Mac Díarmada 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, Republic of Ireland, Ireland. It was a sub-kingdom of the kingdom of Connach ...

( Magh Luirg). The Mac Donagh (Mac Donnchadha) surname originates from Donnchadh, son of Tomaltach na cairge (of the rock) ua Mac Diarmata, who was King of Moylurg 1197-1207. They later split into two groups, one based in

Collooney Collooney or Coloony () is a town in County Sligo, Ireland. Toponymy Collooney is thought to derive from . Reverend Terrence O'Rorke has previously also suggested ''Culmaine'', as Collooney is designated this way in such works as the ''Annal ...

and Ballindoon (Tirerril), and the other in

Ballymote Ballymote () is a market town in southern County Sligo, Ireland. It is around 20 km south of Sligo town in the province of Connacht, which is in the north-west of Republic of Ireland, Ireland. Ballymote lies in the Barony (Ireland), barony ...

( Corran).

Saint Patrick

Saint Patrick departed across the mountain of the sons of Ailellus, and he founded churches there, Taemnach, and Ethenach, and Cell Angle, and Cell Senchuoe. AD 545.2 St. Ailbhe, of Seanchu Ua nOiliolla, died.

References

Medieval history of Ireland Historic Gaelic territories {{Ireland-stub