Name Conghalach Laidhgnen | ||
Conghalach mac Laidhgnen ua Gadhra, King of Gailenga, died 993.
Conghalach was a son of Laidhgnen ua Gadhra, who was in turn a grandson of Gadhra, from whom the surname O'Gara derived.
References
Conghalach mac Laidhgnen ua Gadhra Wikipedia(Text) CC BY-SA