 There are contradictory sources for early history of Mac Suibhne Boghaineach.In the Book of Ballymote (c. 1400), six of Dubhghall's grandsons are said to belong to the Mac Suibhne of Connacht.The eldest of the grandsons, Toirdhealbhach was also listed as the High Constable of Connacht and was killed with two of his brothers, Donn Sléibhe and Donnchadh in 1397.