John Berkeley (1352–1428) John Berkeley (1352–1428) Sir John Berkeley (1352–1428), of Beverston Castle, Gloucestershire was an English politician. He was the son of Thomas de Berkeley, 3rd Baron Berkeley of Berkeley Castle and Katherine Clivedon. He was knighted before 1383. He was appointed High Sheriff of Somerset and Dorset for 1390–91 and 1394–95, High Sheriff of Gloucestershire for 1392–93, 1397–98 and 1414–15, High Sheriff of Hampshire for 1402–03 and 1406–07, and High Sheriff of Wiltshire for 1410–11. He was a Member (MP) of the Parliament of England for Gloucestershire in February 1388, September 1388 and January 1397, for Somerset in November 1390 and
Thomas de Berkeley, 5th Baron Berkeley including in 1395 when he served jointly with Gilbert Denys. Nigel Saul states that such feoffees were likely to have been members of Lord Berkeley's retinue. These were very significant positions of trust granted to his feoffees as Berkeley died leaving only a daughter and the succession to the vast Berkeley lands, including the castle itself, became a matter of much dispute amongst his possible heirs resulting in a series of feuds which led in 1470 to the last private battle fought on English soil at the Battle of Nibley Green, between Lord William Berkeley and Viscount Lisle, and there