1210) was an Anglo-Norman nobleman and a member of Richard de Clare, 2nd Earl of Pembroke's Irish invasion force, and Lord Chief Justice of Ireland.
His death, while Lord Chief Justice of Ireland, is recorded in Athlone by the Annals of the Four Masters under the year 1210 and his remains lie today in Abbeylara's Cistercian abbey.
Muiris became Lord of Jordanstown and had four sons who survived him, Tomás (Thomas), Piaras, Matthew and Ruairí (Roger).
[2] Sir Risteárd de Tiúit held lands at Ballyloughloe in 1342, when he was arrested on suspicion of treason.
The surname may be from the Eure region of Normandy where the root, Tuit (generally spelt Thuit as a single or first element), indicates a clearing in a wooded area and represents the local development of the Old Norse word thveit (also written þveit), but sometimes from Old Danish thwēt, brought by the Scandinavians when they settled in Normandy[4] and is similar to English Thwaite also from Old Norse or Old Danish.