Glasdromainn’s Rival O’Neills
Archived: 19 October 2026
Abstract
In 1493, Conn Ó Néill’s treacherous killing by his brother Henry Óg triggered a contested succession in Tír Eóghain. Backed respectively by Ó Domhnaill and by Uí Chatháin and Uí Mhealláin, Domhnall Clárach and Henry Óg fought at Glasdromainn, where Henry prevailed, though instability continued. Ó Domhnaill’s later Ulster hosting ravaged territories but won no settlement. Across Ireland, killings, raids, burnings and changes of lordship affected Leinster, Offaly, Breifne and Connacht. Gerald FitzGerald, earl of Kildare, visited Henry VII amid political scrutiny. Annals also recorded deaths of clerics, poets and aristocratic women, revealing cultural ties and piety during the year.