Uaithne Mág Samhradháin (anglicised Owen McGovern) was chief of the McGovern Clan of Tullyhaw, County Cavan from 1540 until his death.
His ancestry was Uaithne son of Maghnus (d. 1497) son of Tomás Óg (d. 1494) son of Tomás na Feasoige (d. 1458) son of Fearghal (d. 1393) son of Tomás (d. 1343) son of Brian ‘Breaghach’ Mág Samhradháin (d. 1298).[1] He was a younger son and his older brother Tomás was chief of the clan from 1512–1532.
The Annals of the Four Masters for 1521 state-
Donough, the son of Rory, son of Brian Maguire, was slain by the sons of Magauran, namely, Donnell Oge, son of Donnell Bearnagh, and Owny, the son of Manus Magauran. And there was not of his tribe in his time a better man than this Donough.
The Annals of Ulster for 1521 state-
Donchadh, son of Ruaidhri, son of Brian Mag Uidhir, was slain this year by the sons of Mag Samradhain, namely, by Uaithne, son of Maghnus Mag Samradhain and by Domnall junior, son of Domnall Gapped-tooth Mag Samradhain. And there was not a man of his means in Ireland, in my opinion, that was of better hospitality than that Donchadh.
The Annals of the Four Masters for 1527 state-
Flaherty, the son of Rory, son of Brian Maguire, was slain by Teallach-Eachdhach, i.e. by Owny, the son of Manus Magauran.
The Annals of the Four Masters for 1532 state-
The son of Mag Samradhain, namely, Domnall junior, son of Domnall Gapped-tooth, was slain with one stroke of javelin by Aithne, son of Maghnus, son of Thomas Mag Samradhain.
On the death of the McGovern chief, Uaithne took the chieftaincy and moved to the chief's residence in Ballymagauran. The Annals of Ulster for 1540 state-
Mac Samradhain was slain in treachery this year and Aithne was made king in his stead.