Creassa inion Urchadh Princess of the Uí Briúin Seóla and Queen of Connacht, fl.
[1] Creassa was a daughter of King Urchadh mac Murchadh of Maigh Seóla (reigned 891?-943).
She was married to King Tadg mac Cathail of Connacht (reigned 925-956).
[3] Each of her three sons would found important Connacht dynasties; Máel Ruanaid Mór's would become Kings of Moylurg, while Tadg's descendants would become royal marshals and bodyguards of the kings of Connacht, such as Fearghal Ó Taidg an Teaghlaigh.
[4] This line of the family would remain Kings of Connacht into the 15th century; two of them – Toirdelbach Ua Conchobair (1088–1156) and Ruaidrí Ua Conchobair (died 1198) – would become High Kings of Ireland.