Clergyman and Protestant reformer. He was born in Longnewton in the Scottish Borders and educated at the University of St Andrews (1515-17). He then most-likely spent time in Paris but returned to St. Andrews in 1547 to become Principal of St Mary's College, a post he held for the remainder of his life. He also served as Rector of the University from 1555. He was one of the six who wrote the Confession of Faith of 1560. Douglas succeeded John Hamilton as the first Protestant Archbishop of St. Andrews, serving from 1572 to 1574.