William Bertram, lord of Mitford

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William Bertram obtained a grant from the crown in the 5th year of King John [1204], of the manor of Felton, in Northumberland, with all the woods thereunto belonging. He m. Alice, dau. of Robert de Umfraville, and d. in or before the 7th year of the same reign [1206], for at that time we find King John conferring the wardship of his lordship's son and heir, Roger, upon Peter de Brus, with the custody of his lands during the minority, in consideration of the sum of 300 marks. To the possession of which lands succeeded, when at full age, the said Roger Bertram.

William built the stone keep at Mitford, quarrying one side of the castle's hill to get his material. It was an unusual building with five sides, possibly the only one in Britain at the time. The strengthening work was completed before 1215. This was a fateful year for many Northumbrian castles, but not for Mitford, and indeed it is rumoured that King John stayed there awhile when he returned from his blitzkrieg of vengeance against those noblemen who had payed homage to Scottish King Alexander II. 591

https://cybergata.com/roots/9292.htm

William Bertram Born: Mitford, Northumberland, England (son of Sir Roger I Bertram Knight (-Bef 1177) and Ada de Morville)

William married Alice de Umfreville, daughter of Odonell II de Umfreville Lord of Redesdale, Baron of Prudhoe and Alice de Lucy. (Alice de Umfreville was born about 1161 in Prudhoe Castle, Northumberland, England.)

Children:

• Sir Roger II Bertram Knight+ Married Agnes

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• Family Background. 141 Roger II Bertram was the son and heir of William II Bertram by Alice, sister of Robert d'Umfraville, who gave her Great Babington in free marriage. William II was the son and heir of Roger I by Ada, his wife. Roger I was the son and heir of William I, founder of Brinkburn priory by Hawise, daughter of Guy Balliol, who gave her Stainton in free marriage. [Cartularies of Brinkburn and Newminster, passim: Deed in Hodgson, ut spra, pp. 24, 26 and in Walbran, Gainford, appendix, no. 35]

~Cokayne's Complete Peerage, 2nd Edition, Vol. II, p. 160, footnote (a)

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References

1. http://www.geneajourney.com/brtrm.html#wm2brtrm