Introduction

Outlined 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 and 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

From the Master Codex of the Imperial and Royal House of Bradley (Ua Bhrolcháin / Ó Brolcháin)

Comprising the Kindreds of Cenél nEógain and Cenél Conaill

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I. Preamble and Declaration of Purpose

This chart sets forth the hierarchical constitution of the Northern Uí Néill confederation — that illustrious dynastic alliance descended from

Niall Noígíallach (Niall of the Nine Hostages), High King of Ireland, circa AD 379–405.

The confederation consisted principally of two great kindreds:

• Cenél nEógain — the Kindred of Eógan

• Cenél Conaill — the Kindred of Conall

Together they formed one of the most formidable political and cultural powers in early and medieval Ireland, exercising dominion over the northern provinces for more than seven centuries.

The ancient royal seat of the Northern Uí Néill was the hill‑fort of Grianán of Aileach, commanding the approaches to Inishowen and the wider north‑western territories. Though the Cenél Conaill first held primacy, the Cenél nEógain rose to ascendancy from the eighth century onward, and the over‑kingdom became known as Ailech. From this supremacy emerged the royal houses of O’Neill and Mac Lochlainn, who would contend for—and at times hold—the High Kingship of Ireland.

This chart is entered into the Master Codex of the Imperial and Royal House of Bradley, an ecclesiastical princely house of the Cenél nEógain, to preserve the order, dignity, and precedence of the constituent clans for all generations.

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II. Cenél nEógain — The Kindred of Eógan

Senior Branch of the Northern Uí Néill Territories: Inis Eoghain (Inishowen), Tír Eoghain (Tyrone), and 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) 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). The O’Neill held the kingship of Tyrone and frequently asserted the High Kingship of Ireland, remaining the foremost Gaelic lordship in Ulster until the Flight of the Earls in 1607.

2. MAC LOCHLAINN / McLAUGHLIN (Mac Lochlainn) Kings of Ailech, High Kings of Ireland. The earlier dominant royal line of the Cenél nEógain. Muirchertach Mac Lochlainn (d. 1166) was the last of this house to hold the High Kingship. Their seat at Aileach marks them as the most ancient royal succession of the kindred.

 

TIER II — GREAT VASSAL LORDS AND PROVINCIAL CHIEFS

Sub‑Kings, Lords, and Chiefs of the Cenél nEógain Territories

3. O’KANE (Ó Catháin) Lords of Keenaght A formidable vassal house commanding Keenaght in modern County Londonderry, renowned for military strength and territorial influence.

4. O’HAGAN (Ó hÁgáin) Chiefs of Tullaghoge; Hereditary Stewards and Inaugurators of the O’Neill. Custodians of the sacred inauguration rite at Tullaghoge, whose authority to enthrone the O’Neill kings conferred a dignity surpassing their territorial holdings.

5. O’QUINN (Ó Cuinn) Chiefs in Tyrone. An ancient sept maintaining its chieftainship through steadfast alliance with the O’Neill overlords.

6. O’DONNELLY (Ó Donnghaile) Lords of Ballydonnelly; Chiefs in Tyrone. A prominent military sept providing warriors and counsel to the O’Neill kings.

7. O’GALLAGHER (Ó Gallchobhair) — Cenél nEógain Branch Chiefs of the Cenél nEógain Gallchobhair A distinct branch of the O’Gallagher lineage holding lands within the Cenél nEógain domain.

 

TIER III — ECCLESIASTICAL AND LEARNED HOUSES

Custodians of Sacred Learning, the Church, and the Bardic Tradition

8. UA BHROLCHÁIN / BRADLEY (Ó Brolcháin / Ua Bhrolcháin) Royal Princes and Ecclesiastical Princes; Coarbs of Derry; Hereditary Stewards of Faith and Learning.

A princely ecclesiastical dynasty producing coarbs, scholars, and monastic leaders of Derry, Armagh, and Raphoe. Their authority derived from sacred stewardship rather than conquest. This house is the progenitor of the Imperial and Royal House of Bradley.

9. O’CAROLAN (Ó Cearbhalláin) Hereditary Poets, Bards, and Musicians. Keepers of genealogies, praise‑poetry, and the oral tradition essential to Gaelic kingship.

 

TIER IV — MILITARY, ADMINISTRATIVE AND TERRITORIAL CLANS

Warriors, Administrators, and Holders of Hereditary Lands

10. O’DEVLIN (Ó Doibhilin) — Chiefs of Munterdevlin 11. O’GORMLEY (Ó Goirmleadhaigh) — Chiefs of Ráth Lúirc 12. O’CANNON (Ó Canannáin) — Military Chiefs

13. O’MULDORY (Ó Maoldoraidh / Ua Maol Doraidh) — Kings of the Northern Uí Néill (Final Dynasty) 14. O’LAVERTY (Ó Flaithbheartaigh) — Chiefs in Tyrone / Derry

15. O’HAMILL (Ó hAdhmaill) — Chiefs in Tyrone 16. O’LUNNEY (Ó Luinigh) — Chiefs in Tyrone

Each of these septs upheld the defence, governance, and martial obligations of the Cenél nEógain realm.

 

III. Cenél Conaill — The Kindred of Conall

Junior Branch of the Northern Uí Néill Territory: Tír Chonaill (Tyrconnell / County Donegal)

 

TIER I — ROYAL DYNASTY

1. O’DONNELL (Ó Domhnaill) Lords and Kings of Tír Chonaill. The paramount dynasty of the Cenél Conaill. Red Hugh O’Donnell (Aodh Rua Ó Domhnaill, d. 1602) remains one of Ireland’s most celebrated leaders.

 

TIER II — GREAT VASSAL LORDS

2. O’DOHERTY (Ó Dochartaigh) Lords of Inishowen. Commanders of the strategic peninsula whose rebellion in 1608 marked the twilight of Gaelic sovereignty in the north.

3. O’GALLAGHER (Ó Gallchobhair) — Cenél Conaill Branch Marshals of Cenél Conaill; Hereditary Military Commanders to the O’Donnell. The unique dignity of “marshal” distinguished them as the sword‑arm of Tyrconnell.

4. O’BOYLE (Ó Baoighill) Chiefs of the Three Tuatha (West Donegal)

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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.