Niall Frossach

Who was Niall Frossach?

Niall Frossach was an 8th-century Irish king of Ailech, sometimes considered to have been High King of Ireland. Brother of high king Áed Allán, Niall was the son of high king Fergal mac Máele Dúin and a member of the Cenél nEógain, a branch of the Northern Uí Néill. The epithet Frossach is said to come from showers of silver, honey and wheat which fell on his home at Fahan in Inishowen at his birth.

Upon the death of his brother he became King of Ailech. He ruled as King of Ailech from 743 to 770. However the new high king Domnall Midi of the Clann Cholmáin branch of the southern Ui Neill appointed Áed Muinderg of the rival Cenél Conaill as his representative in the north. In 756 conflict with Domnall broke out and Domnall led a force of Laigin with him as far as Mag Muirtheimne in modern County Louth. This region had been recently brought under overlordship by Niall's brother Áed Allán in 735.

Niall followed Domnall Midi as High King in 763. His reign was considered notably peaceful. The law of Saint Patrick was again proclaimed in force in 767.