Tadhg Ua Cellaigh, 39th King of Uí Maine and 6th Chief of the Name, abducted 1145.
Abduction and disappearance
In 1145 an army of Munster invaded Connacht. The Four Masters state they carried off Ua Ceallaigh, i.e. Tadhg, son of Conchobhar, lord of Ui-Maine, and slew Ruaidhri Ua Flaithbheartaigh. No more is heard of Tadhg, who was succeeded by Conchobar Maenmaige Ua Cellaigh soon after. Conchobar appears to have been his son or grandson.
References
Tadhg Ua Cellaigh Wikipedia(Text) CC BY-SA