William Peryn (died 1558) was an EnglishSingle scrollbar[[Catholic Church|Catholic]]theologian and prior of St Bartholomew's,[[Smithfield, London]]. Peryn was educated at Blackfriars in[[Oxford]]and there are records of him being there in 1529 and 1531, the year in which he was ordained.ref He went to London and was a preacher strongly against heresy, and a chaplain to Sir . He went into exile with the declaration of the[[royal supremacy]]in 1534 but returned to England in 1543, when he applied for a degree of BTh at Oxford. He became a chantrist at and in early 1547 preached in favour of images in religious services.ref With the accession of Protestant[[Edward VI of England|Edward VI]]in 1547 he went into exile again, spending several years in[[Leuven|Louvain]]before returning to England in 1553 upon the accession of Catholic[[Mary I of England|Mary]]. That year he was appointed prior of the Dominican house at St Bartholomew's in Smithfield. This was the first religious house founded by Mary. On 8 February 1556 Peryn is recorded by the diarist[[Henry Machyn]]as preaching at[[Paul's Cross]].ref