 He is called "Bricius Douglas" by David Wilkins's "Concilia magnae Britanniae et Hiberniae", and this is supported by two men who used this name, "Arkenbald and Henric" (Archibald and Henry), being called his brothers.Bricius appears to have been a son of "William de Dufglas", and had five brothers, four of whom also became clerics, all in the Moray diocese.The fifth and presumably eldest brother, Archibald of Douglas, succeeded to the Barony of Douglas in Lanarkshire.