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 The History of the County of Mayo to the Close of the Sixteenth Century. With illustrations and three maps, Hubert T. Knox. Originally published 1908, Hogges Figgies and Co. Dublin. Reprinted by De Burca rare books, 1982. . External links http://www.ucc.ie/celt/published/T100005B/ http://www.rootsweb.ancestry.com/~irlkik/ihm/connacht.htm#lui 10th-century Irish monarchs People from County Mayo 993 deaths Year of birth unknown