William Mostyn was a 17th-century Welsh Anglican priest.
[1] The son of Sir Roger Mostyn, M.P.,[2] he was born in Flintshire and educated at Queens' College, Cambridge.
[3] He became a Fellow of St John's College, Cambridge in 1625; and was incorporated at Oxford in 1639.
[4] He became Archdeacon of Bangor in 1633, Rector of Christleton in 1634 and Vicar of Whitford, Flintshire in 1639.
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