Ó, Ua
Definitions (by source)
[168, 169]. General usage is Ó Conchobhair, Í Chonchobhair, Ú Chonchobhair. In cases like Ó Conchobhair Donn (i.e. when the Donn is part of the family name) the Donn agrees in case with the Ó, etc.
Aithdioghluim Dána: A Miscellany of Irish Bardic Poetry, Historical and Religious, including the Historical Poems of the Duanaire in the Yellow Book of Lecan. Vol II, Translations, Notes, Vocabulary. Editor: Lambert McKenna S.J.