Bibliography and References
This research on the O'Hagan family's role as brehons and their migration from Inishowen to Tullyhogue draws on a wide range of historical sources, archaeological evidence, and scholarly works.
The Annals of the Four Masters
A chronicle of medieval Irish history compiled between 1632 and 1636 by a team of scholars led by Brother Mícheál Ó Cléirigh. Contains some of the earliest references to the O'Hagan family, including the record of Magrath O'Hagan, Lord of Cinel Fergus, who was slain in 1081.
Branches of the Cenél nEógain
Provides information on the various branches of the Cenél nEógain dynasty, including the Cenél Feargusa from which the O'Hagans descended. Details the eastward expansion of these groups across Ulster.
Cultural Landscapes of Late Medieval Gaelic Ulster
Scholarly work examining the archaeological evidence and cultural significance of sites like Tullyhogue Fort, providing insights into the O'Hagans' role as custodians of this important ceremonial location.
Recent Discoveries at Tullyhoge: O'Neill Inauguration Site and Native Settlement
Details the archaeological excavations at Tullyhogue Fort, including the discovery of the Grand Hall and other structures associated with the O'Hagan settlement at the site.
The History of Law in Ireland
Overview of the development of legal systems in Ireland, including the transition from Brehon law to English common law and its impact on traditional legal families like the O'Hagans.
The O'Hagan Clan History
Comprehensive resource on O'Hagan family history, including their role as brehons, their migration from Inishowen to Tullyhogue, and their connection to the O'Neill clan.
Flight of the Earls
Information on the 1607 departure of Hugh O'Neill, Rory O'Donnell, and their followers (including several O'Hagans) from Ireland, marking the end of the Gaelic order in Ulster.
Brehon Law
Overview of the ancient legal system of Ireland, which the O'Hagans administered as hereditary brehons to the O'Neill clan for over six hundred years.
Download Research Documents
Access comprehensive research documents about the O'Hagan family's history, their role as brehons, and their migration from Inishowen to Tullyhogue.
O'Hagan Brehons
Detailed research on the O'Hagan family's role as brehons in Irish society
Download PDFThe Great Migration
Research on why the O'Hagans left Inishowen to settle at Tullyhogue
Download PDFFurther Reading
For those interested in exploring the history of the O'Hagan family, Brehon law, or medieval Irish society in greater depth, the following books and resources are recommended:
Early Irish Law Series
Published by the Dublin Institute for Advanced Studies, this series includes translations and analyses of the surviving Brehon law texts, providing insights into the legal system the O'Hagans administered.
The Last of the Celts
By Marcus Tanner. Explores the decline of Celtic cultures, including the collapse of the Gaelic order in Ireland that led to the end of the O'Hagans' traditional role.
Lords of the Isles
By Raymond Campbell Paterson. While focused on Scotland, this book provides valuable context for understanding the Gaelic lordship system that the O'Hagans were part of.
The Plantation of Ulster
By Philip Robinson. Examines the colonization of Ulster that followed the Flight of the Earls, which had profound implications for the O'Hagan family and their lands.