Clan Douglas
A junior branch moved to Tulliallan in Fife and included Robert Blackadder, bishop and then in 1492 the first Archbishop of Glasgow, who added the eponymous crypt and aisle in Glasgow Cathedral. The archbishop died while on a pilgrimage to the Holy Land in 1508. The Fife branch were supporters of Clan Douglas. In 1471 the archbishop was also made Abbot of Melrose, not far from the main Blackadder lands.