Brian Catha an Duin O'Neill (abt. 1200 - 1260)

Ancestors Descendants This profile is being included in the O'Neill Dynasty & Name study - a sub-project of the Irish Roots Project

Brian Ua Néill King of Tyr Eoghain

Brian O'Neill was a 13th century Prince of Tyrone, Ireland; the son of Niall O'Neill ^[1]

In 1258, there was a great gathering at Caol Uisage (near Newry, county Antrim) in which Hugh, the son of Felim O'Connor and Teige O'Brien made peace with each other, and offered Brian O'Neill sovereignty over the Irish. ^{[2] [3]}

Brian O'Neill died in 1260, killed in battle at the Battle of Druim Dearg near Downpatrick in county Down. Killed leading Irish forces against the English in defence of his kingdom of Tyrone. ^{[4] [5]}

Brian Catha (Brian Roe) married Sisile (Cecilia), daughter of Domhnall Mac Lochlin, whose clan Brian had helped subdue. ^[6]

Sons of Brian O'Neill - ^[7]

Donal

Niall (died 1314)

Murrough (died 1356)

Research Notes

Two recent historians believe that King Brian O'Neill was married to Gill (MacDougall) of Argyll, a daughter of Duncan (MacDougal), lord of Argyll, but do not provide any evidence for this claim.^[8][9] Stevens-17832 20:15, 15 February 2023 (UTC)

Sources

1. ↑ (113) Brian Catha Duin - 184th Monarch of Ireland Irish Pedigrees : Heremon Genealogies : O'Neill No:2 page: 718 Princes of Tyrone
2. ↑ A great host was led by Hugh, son of Felim, and Teige O'Brien, to meet Brian O'Neill, at Cael-Uisce. The aforesaid chieftains, with one accord, conferred the sovereignty over the Irish on Brian O'Neill, after having made peace with each other; for the observance of which agreement the hostages of Hugh O'Conor were delivered up to him, and the hostages of Muintir-Reilly, and of all the Hy-Briuin, from Kells to Drumcliff. Annals of the Four Masters page: 369 Ml258.12
3. ↑ Library Ireland : ll Roll of the Monarchs of Ireland Since the Milesian Conquest
4. ↑ recorded in Annal 1260:2 of the the Annála Connacht
5. ↑ Never Felt Better : Ireland's Wars : Druim-Dearg and Stalemate
6. ↑ Desmond O'Neill, The Ancient and Royal Family of O'Neill, Omeath, Ireland
7. ↑ Irish Pedigrees : Heremon Genealogies : O'Neill No:2 page: 718 Princes of Tyrone
8. ↑ Sellar, W.D. Hebridean Sea Kings: The Successors of Somerled, 1164-1316, in Cowan, E.J. (ed). Alba: Celtic Scotland in the Middle Ages. East Linton: Tuckwell Press (2000), p. 325.
9. ↑ Moncreiffe, Sir Iain of that Ilk, Albany Herald. The Highland Clans. New York: Clarkson N. Potter Inc. Publ. (1982), p. 133.

• His profile in the Dictionary of Irish Biography:
  • https://www.dib.ie/biography/oneill-o-neill-brian-a6946
• Brian O'Neill - No: 113 on the O'Neill Pedigree "Princes of Tyrone" Irish Pedigrees or The Origin and Stem of the Irish Nation part:lll page:718 O'Neill No:2 - by John O'Hart
• Brian O'Neill - No: 184 on the Roll of the Kings of Ireland since Heber Library Ireland : ll Roll of the Monarchs of Ireland Since the Milesian Conquest The Line of Heber from Irish Pedigrees; or the Origin and Stem of the Irish Nation by John O'Hart
• Wikipedia : Brian Ua Néill
• Wikipedia - Battle of Down (Battle of Druim Dearg)
• The Peerage
• Jaski, Bart Genealogical tables of medieval Irish royal dynasties Table-14a Early Irish Kingship Succession by Jaski, Bart, Published by Four Courts Press, 2013, ISBN 1846824265 ISBN 9781846824265