Domhnall Ballach Ó Dubhda, Chief of the Name and Lord of Tireragh, died c. 1472.
Almost the only document dealing with the succession as the Ó Dubhda chief of the name is Araile do fhlathaibh Ua nDubhda, which presents many chronological difficulties. Even when dates and/or lengths of reigns are given, they can only be appromiximated as some chiefs may have ruled in opposition to each other.
Araile gives Domhnall Ballach "1" year.
References
Domhnall Ballach Ó Dubhda Wikipedia(Text) CC BY-SA