Ó Domhnalláin
Ó Domhnalláin is the surname of a Brehon family from Máenmaige in Uí Maine, now west County Galway. Overview. They held the post of "Cathmhaol" or Battle Champion of Uí Maine, but by the early 14th century had become poets and brehons. The family took their name from Domnallan mac Maelbrigdi, fl. c. 9th/10th century. Their principal home was at Ballydonnellan, County Galway. An unrelated family of the same name was located in east Ulster. Annalistic references. The Irish annals record the following: