William Duffy (bishop)
William Duffy was a Roman Catholic prelate who served as Titular Bishop of "Ascalon" (1531–?), Auxiliary Bishop of York (1535–?) and Auxiliary Bishop of St Asaph (1531–1535). Biography. William Duffy was ordained a priest in the Order of Friars Minor. On 10 July 1531, he was appointed during the papacy of Pope Paul II as Titular Bishop of "Ascalon" and Auxiliary Bishop of St Asaph. On 16 July 1531, he was consecrated bishop by Octavio de Cesi, Bishop of Cervia, with Bernardo Ruggieri, Bishop Emeritus of Sora serving as co-consecrator. He served as Auxiliary Bishop of  St Asaph until his appointment as Auxiliary Bishop of York in 1535. Probably to be identified with William Duffield, Bishop of "Ascalensis," and Vicar of Barton-upon-Humber, Lincs., who functioned as a suffragan (auxiliary) bishop in the dioceses of Lincoln and York 1535–38. He was executed for treason in 1538 after repudiating the royal supremacy.