Ferg mac Crundmaíl was a King of Ailech

Ailech

Ailech was a medieval kingdom in Ireland, roughly centred on modern-day County Tyrone and the Inishowen peninsula in Ulster....

 and head of the Cenél nEógain

Cenél nEógain

Cenél nEóġain is the name of the "kindred" or descendants of Eógan mac Néill , son of Niall Noígiallach who founded the kingdom of Tír Eoghain in the 5th century...

 branch of the northern Uí Néill

Uí Néill

The Uí Néill are Irish and Scottish dynasties who claim descent from Niall Noigiallach , an historical King of Tara who died about 405....

. He was the son of Crundmáel mac Suibni

Crundmáel mac Suibni

Crundmáel mac Suibni was a King of Ailech and head of the Cenél nEógain branch of the northern Uí Néill. He was the son of the high king of Ireland Suibne Menn...

 (died circa 660) and grandson of the high king of Ireland Suibne Menn

Suibne Menn

Suibne Menn was an Irish king who is counted as a High King of Ireland.Suibne belonged to the junior branch of the Cenél nEógain kindred of the northern Uí Néill, the Cenél Feredaig, named for his grandfather Feredach, a great-grandson of Niall of the Nine Hostages...

 (died 628)

According to the Laud Synchronisms he succeeded his father Crundmáel who ruled for 24 years while he himself ruled for 8 years. His father succeeded his uncle Ernaine mac Fiachnai

Ernaine mac Fiachnai

Ernaine mac Fiachnai was a King of Ailech and head of the Cenél nEógain branch of the northern Uí Néill. He was the brother of the high king of Ireland Suibne Menn...

 (died 636) which gives Ferg a possible reign of 660-668 as King of Ailech. There is no mention of him in the Irish annals.

External links

• CELT: Corpus of Electronic Texts at University College Cork