John Fenwick was a 17th-century English Jesuit priest born in Durham. After converting to Catholicism, he was disowned by his Protestant parents and pursued theological studies in Liège before joining the Society of Jesus in 1660. He served as a missionary and a procurator for the College of St. Omer in London. His life ended during the fabricated Popish Plot, when he was falsely accused of high treason against King Charles II and subsequently executed at Tyburn in 1679.