Uaithne Mág Samhradháin (anglicised Owny McGovern) was chief of the McGovern Clan and Baron or Lord of Tullyhaw barony, County Cavan from 1540 until his death.
[1] He was a younger son and his older brother Tomás Mág Samhradháin, the Fourth was chief of the clan from 1512–1532.
The Annals of Ulster for 1540 state- Mac Samradhain was slain in treachery this year and Aithne was made king in his stead.
Every kern hath a bowe, a sheaf or 3 speares, a swerd and a skene without harneys and every two have a ladde to beare their geare.
Every horsman hath two horses, sume 3, a jacke well harneysed for the more part, a swerd, a skene, a great speare and a dart, Every horss hath a knave and their chefe's horss is ever ledde and one of his knaves ride alway and beare his harneys and speares, if he have harneys.