John Trevor (Welsh: Ieuan Trefor; died 10 April 1410), or John Trevaur, was Bishop of St. Asaph in Wales before becoming nominal Bishop of St Andrews in Scotland. His original name was Ieuan, which he later anglicised to John and took on the surname Trevor. Trevor's brother Adda was married to the sister of Owain Glyndŵr, who appointed him as an...
