1451 in Ireland

Events from the year 1451 in Ireland.

Incumbent

 * Lord: Henry VI

Events

 * Rathmacknee Castle believed to have been built by John Rosseter (Rossiter, Rositer, Rosceter), seneschal of the Liberty of Wexford.

Deaths

 * Murcadh Ó Madadhan, Chief of Síol Anmchadha.
 * Margaret O'Connor, better known by her maiden name Margaret O'Carroll.