Juliana FitzMaurice, Lady of Thomond (c. 1263 – 29 September 1300) was an Anglo-Norman noblewoman, the daughter of Maurice FitzGerald, 3rd Lord of Offaly, and the wife of Thomas de Clare, Lord of Thomond, a powerful Anglo-Norman baron in Ireland, who was a younger brother of Gilbert de Clare, 6th Earl of Hertford.
Juliana's maternal ancestors included Niall of the Nine Hostages, Brian Boru, Dermot McMurrough, and Maud de Braose.
It has been concluded by several reputable researchers that Juliana's mother was Maurice FitzGerald's first wife, Maud de Prendergast.
It is recorded that on 5 May 1284, King Edward notified his lieges and bailiffs in Ireland of the attorneys who were to act on behalf of Thomas and Juliana as they were in England at the time.
[1] Thomas and Juliana had four children:[citation needed] The era was marked by unrest and strife as civil war was waged between rival factions of the powerful O'Brien clan.
By Edward IV's daughter, Elizabeth of York, consort of Henry VII, she was an ancestress to all subsequent monarchs of England and the current British Royal Family.