Thomas de Berkeley, 5th Baron Berkeley the inheritance of Berkeley Castle and the other Berkeley lands, as Lisle being heir-general to Thomas de Berkeley, 5th Baron Berkeley and was the Berkeley heir male. Lisle impetuously challenged Berkeley to a battle, and the latter agreed, the battle to be fought the next day at Nibley Green. Lisle was defeated. Thomas de Berkeley, 5th Baron Berkeley Thomas de Berkeley, 5th Baron Berkeley (5 January 1352/53 – 13 July 1417), "The Magnificent", of Berkeley Castle and of Wotton-under-Edge in Gloucestershire, was an English peer and an admiral. His epithet, and that of each previous and subsequent head of his
Berkeley family Berkeley and of Robert Fitzharding either adopted, or continued the use of, the surname "de Berkeley", the former retaining the truncated feudal barony of Dursley, the latter establishing his line as feudal barons of Berkeley Castle. Both lines of Berkeleys therefore originated as cousins, but it was the line of the feudal barons of Berkeley, descended from Fitzharding in the male line, which was by far the more powerful and which would play the more prominent role in British history in the next several centuries. The Scottish Clan Barclay may or may not be descended from the family; however, the