Uí Néill

The founders of the Uí Néill branches are the alleged sons of Niall Noigiallach, seven in all:

The Northern Uí Néill branch:

• Conall Gulban, ancestor of the Cenél Conaill dynasty,
• Eógan, ancestor of the Cenél nEógain dynasty.

The Southern Uí Néill branch:

• Éndae, ancestor of the Cenél nÉndai,
• Coirpre, ancestor of the Cenél Coirpri dynasty,
• Lóegaire, ancestor of the Cenél Lóegaire dynasty,
• Conall Cremthainne, ancestor of the Clann Cholmáin and Síl nÁedo Sláine,
• Fiachu, ancestor of the Cenél Fiachach.

All these men were in their lifetime known as members of Connachta dynasty, or as "the sons of Niall." The term Uí Néill did not, by its very nature, come into use until the time of Niall's grandsons and great-grandsons.

Dynasties descended from the Uí Néill, such as the Cenél Conaill and Cenél nEógain, held power in Ulster until their defeat in the Nine Years War in 1603. Many of the heads of the families left for Catholic Europe in 1607, an event known as the Flight of the Earls.

Bold indicates a supposed High King of Ireland.

• Gaelic nobility of Ireland
• Haplogroup R1b-M222 (Y-DNA)
• Irish royal families

• Downham, Clare (2018), Medieval Ireland, Cambridge{{citation}}: CS1 maint: location missing publisher (link).
• O'Brien, Michael A., ed. (1962). Corpus Genealogiarum Hiberniae. Vol. 1. Kelleher, John V. (intro. in the reprints of 1976 and 2005). Dublin: DIAS. pp. 133–4, 178–80. ISBN 0901282316. OCLC 56540733. Genealogical tables for the Uí Néill{{cite book}}: CS1 maint: postscript (link)
• Byrne, Francis John (1973), Irish Kings and High Kings, Dublin{{citation}}: CS1 maint: location missing publisher (link).
• Ó Muraíle, Nollaig (2005), "Dubhaltach Mac Fhirbhisigh", The Great Book of Irish Genealogies, Dublin{{citation}}: CS1 maint: location missing publisher (link).
• Smyth, Alfred P (1974), "The Hui Neill and the Leinstermen in the Annals of Ulster, 431–516 A.D", Études Celtiques, 14: 121–43, doi:10.3406/ecelt.1974.1522.

• Matching Niall Nóigiallach at Family Tree DNA
• R-M222 Haplogroup Project at Family Tree DNA