O'Boyle Donegal

The O'Boyle (Ó Baoighill) were a family of the Uí Néill tribe of the Northern Gaels.

The Northern O'Neill were a great tribal dynasty of the North Gaels. The O'Boyles were one of the principal families of the Cenél Conaill within the Uí Néill tribe and originally Chiefs of the Three Tuaths in the northwest of Tír Chonaill (County Donegal). When these lands passed to The MacSweeneys (Mac Suibhne), the O'Boyle became chiefs of Tír Ainmhireach, later to be known as Críoch Bhaoigheallach, or O'Boyles country, now the Barony of Boylagh.

This timeline traces the O'Boyle clan back to Ugaine Mór.

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Wikipedia