[Katherine de Grandison.ged]
William de Grandison was a servant to Edmund, Earl of Lancaster, and obtained from that prince, in consideration of his faithful services and the services of his ancestors a grant of the Manors of Radley and Mebstruworth, County Gloucester. In 1294 he was in the expedition into Gascony, where he continued for some time, and while he was so engaged was summoned to Parliament as a Baron. He was afterwards in the Scottish wars. His lordship married Sibella, youngest daughter and coheiress of Sir John Tregoze, and upon partition of that estate acquired the Manors of Burnham, County Somerset and Eton, County Hereford. He had by his wife Peter, John and Otho and three daughters, including Mabella de Grandison.