Teige Ua Con Ceannainn (nó Tadhg; fl.
The succession to the kingship of Ui Diarmata after the death of Aedh Ua Con Ceannainn in 1119, to the death of Cú Ceanain Ó Con Ceanainn in 1224, is unclear.
Teige is only mentioned retrospectively, in the obituary of his foster-son, King Cathal Crobhdearg Ua Conchobair of Connacht, sub anno 1224: "A heavy and terrible shower fell in part of Connacht this year, that is, in Tir Maine and in Sodain and in Ui Diarmata and in Clann Taidc, which brought about disease and very great sickness among the cows and beasts of those regions after they had eaten grass and leaves; and when men drank of the milk of these cattle and ate of their flesh, they suffered internal pains and various diseases.
This righteous and upright king, this prudent, pious, just champion, died in the robe of a Grey Monk, after a victory over the world and the devil, in the monastery of Knockmoy, which with the land belonging to it he had himself offered to God and the monks, on the twenty-seventh day of May as regards the solar month and on a Monday as regards the week-day, and was nobly and honourably buried, having been for six and thirty years sole monarch of the province of Connacht.
So says Donnchad Baccach O Maelchonaire in his poem on the Succession of the Kings: ‘The reign of Red-hand was a pleasant reign, after the fall of Cathal Carrach; he ruled for sixteen and twenty prosperous calm years.’ And he was in the seventy-second year of his age, as the poet Nede O Maelchonaire says: ‘Three years and a half-year, I say, was the life of Red-hand in Cruachu till the time that his father died in wide-stretching Ireland.’ He was born at Port Locha Mesca and fostered by Tadc O Con Chennainn in Ui Diarmata, and it was sixty-eight years from the death of Toirrdelbach to the death of Cathal Crobderg," as the chronicle shows.