William Bertram, son of Richard Bertram by Sybella Mitford, his wife, founded, with the approbation of his wife and sons, the Augustinian Priory of Brinkburne, in Northumberland, m. Hawyse, dau. of Sir William Merley, of Morpeth, and left issue, Roger, Guy, William and Richard. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 52, Bertram, Barons Bertram, of Mitford]