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Niall Noigiallach Eochaid (abt. 0360 - 0452)

Niall Noigiallach "Niall of the Nine Hostages" Eochaid aka High King of Ireland
Born about in Irelandmap
Ancestors ancestors
Husband of — married [date unknown] [location unknown]
Husband of — married [date unknown] [location unknown]
Descendants descendants
Died in Irelandmap
Profile last modified | Created 21 Mar 2011
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Ireland Native
Niall Noigiallach Eochaid was born in Ireland.

Niall Noígíallach, Niall of the Nine Hostages may be mythological.

The Ui Neill were descended from Niall Noigiallach (better known as Niall of the Nine Hostages) who, as his name indicates, was a powerful enough king to have held one hostage each from the five provinces of Ireland and one each from the Britons, the Franks, the Saxons, and the Scots.[1]

Research Notes

Birth Year Estimation

Based on his father's birth year + 25 years he would be born around 350, however this would make him over 100 at his death, so his birth is adjusted to 360, but there still would appear to be a missing generation here.

Legendary Progenitor

He is the legendary progenitor of the Uı́ Néill dynasties, a warlord who reigned in the late 4th century and early 5th century. Niall Mor, Niall of the Nine Hostages is listed as the 126th monarch of Ireland in John O'Hart's Roll of the Monarchs of Ireland [2]


While primary sources for Niall Noigiallach do not exist (Wikipedia),[3] the Y-chromosome lineage of the medieval Uí Néill dynasty is one of the world's three most profilic (Calloway, 2015).[4] Moore (2006)[5] states that:

"Figures such as Niall of the Nine Hostages reside at the cusp of mythology and history, but our results do seem to confirm the existence of a single early-medieval progenitor to the most powerful and enduring Irish dynasty. They also lend support to the veracity and remarkable knowledge preservation of the genealogical and oral traditions of Gaelic Ireland and give a powerful and specific illustration of the link between prolificacy and power in one European society within the past 2 millennia".


the children of Inne, the daughter of Lugaid [6] [7]
- Faichu - ancestor of the Cenél Fiachach: the Southern Uí Néill
the children of Rignach - [8]
- Lóegaire - ancestor of the Cenél Lóegaire: the Southern Uí Néill
- Éndae
- Máiné - (see note re ancestor of the Uí Maine)
- Eógan - ancestor of the Cenél nEógain; the Northern Uí Néill
- Conall Gulban - of the Cenél Conaill; the Northern Uí Néill
- Conall Cremthainne - ancestor of the Clann Cholmáin & the Síl nÁedo Sláine
- Coirpre - ancestor of the Cenél Coirpri: the Southern Uí Néill


  1. Ancient History Encyclopedia - Ancient Ireland
  2. Irish Pedigrees or the Origin and Stem of the Irish Nation part 2 page 59 by John O'Hart pub. 1892, Dublin
  3. Wikipedia: Niall of the Nine Hostages
  4. Calloway, E. (2015, January 23). Genghis Khan's genetic legacy has competition. Nature. NPG. Retrieved from
  5. Moore, L. T., McEvoy, B., Cape, E., Simms, K. & Bradley, D. G. (2006). A Y-chromosome signature of hegemony in Gaelic Ireland. The American Journal of Human Genetics, 78(2), pp. 334–338. PDF
  6. Wikipedia : Niall of the Nine Hostages
  7. Wikitree : Irish Kingdoms
  8. Wikipedia : Niall of the Nine Hostages

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DNA Connections
It may be possible to confirm family relationships with Niall Noigiallach by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA. Y-chromosome DNA test-takers in his direct paternal line on WikiTree:

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Comments: 8

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I just happened to have noticed that the Uncertain Existence template has been removed from this profile, which seems to make no sense considering the first sentence in the biography is that he "may be mythological" and Wikipedia states that primary sources do not exist. Can anyone explain why the template shouldn't be reinstated?
posted by John Atkinson
Here is another Source it List Descendants

, Origins of Gallagher, O'Neil McLaughlin and many other Irish Surnames Download pdf for quicker viewing. Also list all the Irish Kings back to Heber Scot ect back to Noah ect back to Adam This Book is a digital copy of Irish pedigrees; or, The origin and stem of the Irish nation Published 1892

posted by [Living Scott]
The DOB of both wives are not plausible, Rignach in c420 is too young. Inne in 290 is too old.
posted by Steve Selbrede
Cenel n Eogain-9 and Eochaid-13 appear to represent the same person because: Same father, essentially same name
posted by Marty (Lenover) Acks
Mac Eochy-1 and Eochaid-13 appear to represent the same person because: Same father, some same children. Dates are rather off, though profiles of this era are often off.
posted by Marty (Lenover) Acks
UNKNOWN-18430 and Eochaid-13 appear to represent the same person because: Same person, may need more work before merge, but I'll look around at other matches too.

Niall Noigiallach is 38 degrees from Cecil B. DeMille, 42 degrees from Rosalie Neve and 29 degrees from Henry VIII of England on our single family tree. Login to find your connection.