John Nevill, 4th Baron Nevill, was an English nobleman born around 1430. He was the son of Richard Nevill, 3rd Baron Nevill and Joan de Beaufort. John inherited the title of Baron Nevill after his father's death in 1460 and became a prominent figure during the Wars of the Roses, a series of civil wars for control of the English throne. As a supporter of the Yorkist cause, John Nevill played a significant role in the conflict. He was involved in various battles and political maneuvers, aligning himself with key figures of the time. His life was marked by the turbulent events of the 15th century, which shaped the future of England.