Thomas Berkeley, 5th Baron Berkeley Thomas Berkeley, 5th Baron Berkeley Thomas Berkeley, "de jure" 5th Baron Berkeley, (b. 1472 - 22 January 1532) was a British soldier and aristocrat. He was born to Sir Maurice Berkeley, "de jure" 3rd Baron Berkeley, and Isabel Meade, in England. He was the younger brother to Maurice Berkeley, "de jure" 4th Baron Berkeley, and had a younger brother, James, and younger sister, Anne. On 9 September 1513 he fought in the Battle of Flodden and was knighted by the Earl of Surrey, Thomas Howard. He later became Constable of Berkeley Castle on 15 May 1514, and Sheriff of Gloucestershire,
Berkeley family docent and genealogist at the Berkeley Castle listed the Barclay clan as also descending from the de Berkeley clan through the matriarchal line Alice De Berkeley -- the woman who married Robert Fitzharding and restored the family's name. Additionally, historians on Scottish clans and surnames point out that the Barclay clan spelling moves into the Berkeley (pronounced Bar-Clay) spelling. This descends from Sir Maurice Berkeley (by 1514–81), a politician who rose rapidly in the Tudor court. He came from the Berkeleys of Stoke Gifford, a cadet branch of the main Berkeley family, as a descendant of Sir Maurice de Berkeley