Career
Caineach was one of three daughters of King Urchadh mac Murchadh of Maigh Seóla (died 943). She became the wife of a prince of the Síol Muiredaig, and thus an ancestor of the Clann Coscraig sept of the dynasty. She was an aunt of three notable Irish rulers:
King Máel Ruanaid Mór mac Tadg of Moylurg (fl 956))
King Conchobar mac Tadg of Connacht (reigned 967-973)
High King of Ireland, Brian Boru (reigned 1002–1014).
