Sir William Bertram, Baron of Mitford

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.

In about 1095 Sir Robert and Sibella Bertram's son, William, married Hawise, a daughter of Guy de Balliol, Baron of Bywell. Their domestic arrangements during their first twenty years of married life are a mystery, but they must have had somewhere pleasant to call home as Robert gave Hawise's dowry, the Bothal estate, to his young brother. By 1115, however, the couple were ensconced in a motte and bailey built on a steep hill at Mitford, close to the junction of the Wansbeck and Font rivers. Before they claimed the site, the hill had been like a small burgh where the villagers lived; they were moved to the valley below and, as some compensation, the Bertrams built a church, parts of which can still be seen although the present church is mainly 1875 work. A little later, between 1130 and 1135, William founded Brinkburn Priory.

William Bertram (son of Richard Bertram and Sigel Mitford)5, 5 was born 1099 in Mitford, Northumberland, England5, 5, 5, and died 1152 in Mitford, Northumberland, England5.He married (1) Hawise Balliol, daughter of Guy De Baliol and Dianysia Or Dionisia. More About William Bertram: Died 2: 1150, Mitford, Conorthumberland, England.5, 5

Children of William Bertram and Hawise Balliol are:

• +Richard Bertram, b. 1134, Barony, Mitford, Northumberland, England5, 5, 5, d. 1177, Bothal Demesne, Morpeth, Northumberland, England5, 5, 5.

Children of William Bertram are:

• Roger Bertram, b. 1126, Barony, Mitford, Northumberland, England5, d. 1177, High Ward, Brinkburn, Northumberland, England5.
• William Bertram, b. 1132, Barony, Mitford, Northumberland, England5, d. date unknown, Y5.