Introduction

Set forth in this chapter is the formal hierarchical ordering of the Northern Uí Néill, the great confederation descended from Niall Noígíallach, whose kindreds shaped the political, ecclesiastical, and cultural destiny of the north of Ireland for more than seven centuries. Drawn from the annalistic record and preserved within the Master Codex of the Imperial & Royal House of Bradley, this chart presents the royal houses, vassal lords, ecclesiastical dynasties, and territorial clans whose ranks together formed the enduring structure of Northern Uí Néill sovereignty.

Here the reader will find the ordered precedence of the Cenél nEógain and Cenél Conaill, the royal lines of Ailech and Tyrconnell, the custodians of sacred learning, the hereditary inaugurators of kings, and the martial houses who guarded the marches of Ulster. Among these stands the Ua Bhrolcháin (Bradley) line — ecclesiastical princes of the Cenél nEógain — whose stewardship of faith, manuscript tradition, and monastic federations bound the spiritual foundations of the confederation to its temporal power.

This page serves as both an archival verdict and a ceremonial testament: a structured record of rank, dignity, and lineage, preserved so that the order of the Northern Uí Néill may be known, honoured, and transmitted to all generations who inherit this legacy.

HIERARCHICAL CHART OF THE
NORTHERN UÍ NÉILL CONFEDERATION

From the Master Codex of the Imperial & Royal House of Bradley

Comprising the Kindreds of Cenél nEógain & Cenél Conaill

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I. Preamble & Declaration of Purpose

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This chart records the hierarchical structure of the Northern Uí Néill confederation, the great dynastic alliance descended from Niall Noígíallach (Niall of the Nine Hostages), High King of Ireland (r. c. 379–405 AD). The Northern Uí Néill comprised two principal kindreds: the Cenél nEógain (Kindred of Eógan) and the Cenél Conaill (Kindred of Conall), each named for a son of Niall. Together, these kindreds formed one of the most powerful political confederations in early and medieval Ireland, exercising dominion over the northern provinces for more than seven centuries.

The royal seat of the Northern Uí Néill was the ancient hill-fort of Grianán of Aileach, situated in what is now County Donegal, commanding the approaches to Inishowen and the broader territories of the north-west. The Cenél Conaill initially held supremacy within the confederation; however, from the eighth century onward, the Cenél nEógain rose to pre-eminence, and the over-kingdom became known as Ailech. From this ascendancy emerged the great royal houses of O'Neill and Mac Lochlainn, who would contest and hold the High Kingship of Ireland itself.

This chart is compiled for inclusion in the Master Codex of the Imperial & Royal House of Bradley (Ua Bhrolcháin / Ó Brolcháin), an ecclesiastical princely house of the Cenél nEógain. It is set down herein as a perpetual record of the hierarchical order, titles, and dignities of the constituent clans and houses of the Northern Uí Néill confederation, that their memory and precedence may be preserved for all generations to come.

 

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II. Cenél nEógain — The Kindred of Eógan

Senior Branch of the Northern Uí Néill

Named for Eógan mac Néill, son of Niall Noígíallach. 

Territory: Inis Eoghain (Inishowen), Tír Eoghain (Tyrone), and the lands extending into Derry. 

Royal Seat: Grianán of Aileach.

TIER I — ROYAL DYNASTIES

Kings of Ailech & High Kings of Ireland

1. O'NEILL (Ó Néill / Ua Néill)

Title: Kings of Tyrone, Kings of Ulster, High Kings of Ireland

The paramount dynasty of the Cenél nEógain from the tenth century. Descended from Niall Glúndub mac Áeda (d. 919), High King of Ireland, the O'Neill held the kingship of Tyrone and frequently claimed the High Kingship of Ireland. They were the senior royal house of the Northern Uí Néill in the later medieval period and remained the most powerful Gaelic lordship in Ulster until the Flight of the Earls in 1607.

2. MAC LOCHLAINN / McLAUGHLIN (Mac Lochlainn)

Title: Kings of Ailech, High Kings of Ireland

The earlier dominant royal line of the Cenél nEógain, who held the kingship of Ailech and the High Kingship before the rise of the O'Neill. Muirchertach Mac Lochlainn (d. 1166) was the last Mac Lochlainn to hold the High Kingship of Ireland. Their seat was at Grianán of Aileach, and their lineage represents the most ancient royal succession of the kindred.

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TIER II — GREAT VASSAL LORDS & PROVINCIAL CHIEFS

Sub-Kings, Lords, and Chiefs of the Cenél nEógain Territories, Part of the Tanistry for Kings of Ailech, High Kings of Ireland

3. O'KANE (Ó Catháin)

Title: Lords of Keenaght (Ciannachta Glinne Geimhin)

Powerful sub-kings controlling the territory of Keenaght in what is now County Londonderry. The O'Kanes were one of the most formidable vassal houses of the O'Neill, commanding extensive lands and military resources in the north-western reaches of the Cenél nEógain domain.

4. O'HAGAN (Ó hÁgáin)

Title: Chiefs of Tullaghoge, Hereditary Stewards and Inaugurators of the O'Neill

The O'Hagan held the sacred office of inaugurating the O'Neill kings at the stone chair of Tullaghoge (Tulach Óg). This ceremonial role — the right to elevate a man to the kingship — made them indispensable to the legitimacy of the O'Neill dynasty and accorded them a dignity far exceeding their territorial extent.

5. O'QUINN (Ó Cuinn)

Title: Chiefs in Tyrone

An ancient Cenél nEógain sept with territorial holdings in Tyrone. The O'Quinns maintained their chieftainship through enduring alliance with the O'Neill overlords and were reckoned among the established houses of the kindred.

6. O'DONNELLY (Ó Donnghaile)

Title: Lords of Ballydonnelly, Chiefs in Tyrone

A prominent military sept of the Cenél nEógain. The O'Donnellys held lands centred upon Ballydonnelly in County Tyrone and served as important vassals to the O'Neill, furnishing warriors and counsel to the overlordship.

7. O'GALLAGHER (Ó Gallchobhair) — Cenél nEógain Branch

Title: Chiefs of the Cenél nEógain Gallchobhair

A branch of the O'Gallagher sept aligned with the Cenél nEógain, distinct from the more prominent Cenél Conaill branch. This line held lands within the Cenél nEógain territory and maintained their identity as a separate house of the kindred of Eógan.

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TIER III — ROYAL & ECCLESIASTICAL - LEARNED HOUSES

Custodians of Sacred Learning, the Church and Family Lands and Territorial Lands, and the Bardic Tradition as Judges, Part of the Tanistry for Kings of Ailech, High Kings of Ireland

8. UA BHROLCHÁIN / BRADLEY (Ó Brolcháin / Ua Bhrolcháin)

Title: Royal Princes and Ecclesiastical Princes, Coarbs of Derry, Hereditary Stewards of Faith and Learning

The Ua Bhrolcháin were a princely ecclesiastical dynasty of the Cenél nEógain. They produced numerous high-ranking churchmen, including coarbs (hereditary abbots) and scholars of Derry, Armagh, and Raphoe. Their authority was exercised not through conquest but through stewardship of sacred learning and the illuminated manuscript tradition. They served as spiritual legitimizers of kingship and were closely allied with both the O'Neill and Mac Lochlainn royal houses. Their custodianship of the monastic federations of Derry, Armagh, and Raphoe made them essential pillars of Northern Uí Néill civilization. 

This house is the progenitor of the Imperial & Royal House of Bradley.

 

9. O'CAROLAN (Ó Cearbhalláin)

Title: Hereditary Poets, Bards, and Musicians

The O'Carolans held the honoured position of hereditary ollam (chief poet) and musician within the Cenél nEógain. They were keepers of the oral tradition, genealogies, and praise-poetry essential to Gaelic royal culture — without whose art no king's deeds could be remembered.

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TIER IV — MILITARY, ADMINISTRATIVE & TERRITORIAL CLANS

Warriors, Administrators, and Holders of Hereditary Lands, Part of the Tanistry for Kings of Ailech, High Kings of Ireland

10. O'DEVLIN (Ó Doibhilin)

Title: Chiefs of Munterdevlin (Muintir Dhoibhilin)

A sept holding territory in County Tyrone. The O'Devlins served as military vassals and territorial administrators within the Cenél nEógain confederation, maintaining order and defence in their assigned lands.

11. O'GORMLEY (Ó Goirmleadhaigh)

Title: Chiefs of Ráth Lúirc

The O'Gormleys were chiefs in the territory around Strabane and the Sperrin Mountains. They held their chieftainship under the overlordship of the O'Neill and defended the western marches of the Cenél nEógain lands.

12. O'CANNON (Ó Canannáin)

Title: Military Chiefs

The O'Cannons served as military leaders within the Cenél nEógain, providing martial service and armed retinues to the overlords of Ailech in times of war and assembly.

13. O'MULDORY (Ó Maoldoraidh / Ua Maol Doraidh)

Title: Kings of the Northern Uí Néill (Final Dynasty)

The O'Muldory hold the distinction of providing the last recorded King of the Northern Uí Néill: Flaithbheartach Ua Maol Doraidh (r. 1196–1197). Their name, meaning "devotee of Doraidh," preserves a link to the ancient devotional traditions of the kindred.

14. O'LAVERTY (Ó Flaithbheartaigh)

Title: Chiefs in Tyrone / Derry

A sept of the Cenél nEógain maintaining territorial holdings in the borderlands of Tyrone and Derry. The O'Lavertys guarded the marchlands between the Cenél nEógain heartland and the neighbouring territories.

15. O'HAMILL (Ó hAdhmaill)

Title: Chiefs in Tyrone

The O'Hamills held lands within the Cenél nEógain territory, serving as loyal vassals to the O'Neill overlordship and contributing to the defence and governance of the kindred's domain.

16. O'LUNNEY (Ó Luinigh)

Title: Chiefs in Tyrone

A sept of the Cenél nEógain with hereditary lands in County Tyrone. The O'Lunneys maintained their position through faithful service to the O'Neill kings and stewardship of their ancestral territory.

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III. Cenél Conaill — The Kindred of Conall

Junior Branch of the Northern Uí Néill

Named for Conall Gulban mac Néill, son of Niall Noígíallach. 

Territory: Tír Chonaill (Tyrconnell / County Donegal). The Cenél Conaill initially held supremacy over the Northern Uí Néill but were surpassed by the Cenél nEógain from the eighth century onward.

TIER I — ROYAL DYNASTY

Kings and Lords of Tír Chonaill, Part of the Tanistry for High Kings of Ireland

1. O'DONNELL (Ó Domhnaill)

Title: Lords and Kings of Tír Chonaill (Tyrconnell)

The paramount dynasty of the Cenél Conaill. The O'Donnells ruled Tyrconnell (modern County Donegal) and were among the most powerful Gaelic lords in all of Ireland. Red Hugh O'Donnell (Aodh Rua Ó Domhnaill, d. 1602) was one of the most celebrated leaders of the Nine Years' War against English rule, and the O'Donnell name remains synonymous with Donegal to this day.

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TIER II — GREAT VASSAL LORDS

Military Commanders, Lords, and Chiefs of Tyrconnell, Part of the Tanistry for High Kings of Ireland

2. O'DOHERTY (Ó Dochartaigh)

Title: Lords of Inishowen

The O'Dohertys held the strategic peninsula of Inishowen in northern Donegal, commanding the approaches to Lough Foyle and Lough Swilly. Sir Cahir O'Doherty's Rebellion (1608) was one of the last major Gaelic Irish uprisings before the Plantation of Ulster, and its suppression marked the effective end of independent Gaelic lordship in the north.

3. O'GALLAGHER (Ó Gallchobhair) — Cenél Conaill Branch

Title: Marshals (Constables) of Cenél Conaill, Hereditary Military Commanders to the O'Donnell

The O'Gallaghers served as the hereditary marshals (marescal) of the O'Donnell's military forces, making them the chief military house of Tyrconnell. Their title of "marshal" was unique among Gaelic Irish clans and reflected their paramount military authority — a dignity that set them apart as the sword-arm of the Cenél Conaill.

4. O'BOYLE (Ó Baoighill)

Title: Chiefs of the Three Tuatha (West Donegal)

The O'Boyles held chieftainship over territories in western Donegal, serving as important vassals of the O'Donnell lords of Tyrconnell. Their domain encompassed the rugged Atlantic coastlands, and they maintained their position through loyalty and service to the paramount lords of the kindred.

IV. Table of Royal Precedence

A consolidated registry of the twenty principal houses of the Northern Uí Néill confederation, ordered by tier of precedence and historical seniority within each tier.