Thomas Barrett (; died ) was a fifteenth-century Bishop of Annaghdown.
Barrett obtained a papal provision to the see of Annaghdown on 17 April 1458 and acted as a suffragan bishop in the English dioceses of Exeter (1458; 1468–75) and Bath and Wells (1482–85)., Handbook of British Chronology, p. 331., A New History of Ireland, volume IX, p. 324.
According to Cotton, Barrett was also a canon of York Minster; holding the Prebendary of Laughton (1466–67)., Prebendaries of Laughton, Fasti Ecclesiae Anglicanae 1300–1541, volume 6, pp. 64–65., The Province of Connaught, p. 55.
Barrett died sometime after 1485.
Notes
References