A Legacy of Law and Tradition
Explore the fascinating history of the O'Hagan family, from their origins as part of the Cenél Feargusa branch of the Cenél nEógain, to their prestigious role as brehons (judges) and inaugurators of the O'Neill kings, and their strategic migration from Inishowen to Tullyhogue.
Ancient Origins
The O'Hagan surname dates back to the pre-10th century, derived from Ó hÁgáin or Ó hÓgáin, meaning "Little Flamboyant Fire from the Sun." Discover the family's ancestral connections to Niall of the Nine Hostages and their early history in Ulster.
Learn more →Brehon Tradition
For over six hundred years, the O'Hagans served as hereditary brehons (judges and law-givers) to the O'Neill clan in Ulster. Explore their crucial role in maintaining and interpreting Brehon law, one of Europe's oldest legal systems.
Learn more →The Great Migration
Discover why and how the O'Hagans "battled their way" from Inishowen to Tullyhogue, as part of a broader eastward movement of the Cenél nEógain dynasty across Ulster, and how this migration shaped their future role in Irish history.
Learn more →Explore the O'Hagan Timeline
Journey through key moments in O'Hagan history, from their early origins to their role in the Flight of the Earls and beyond. Discover how this remarkable family shaped and was shaped by the turbulent history of medieval Ireland.
Key Dates
- 1081: First recorded O'Hagan, Magrath, Lord of Cinel Fergus
- 11th c: O'Hagans establish at Tullyhogue
- 1595: Last Gaelic inauguration of Hugh O'Neill
- 1602: Destruction of Tullyhogue inauguration stone