John Byron (died 1450)

Byron was the son and heir of Richard Byron (1354–1415), the son and heir of James Byron of Clayton (c. 1300–1355) by his wife Elizabeth de Bernake. Sir John's mother was Joan de Colwick, daughter and heiress of William de Colwick of Colwick Hall. He was also an early ancestor of Ada Lovelace.

Byron married Margery Booth, daughter of John Booth, with whom he had six daughters and three sons, including Nicholas Byron, who was knighted by Prince Arthur in 1502. Nicholas inherited his father's estates.

• "Byron, Sir John (1386-1450), of Clayton, Lancs. and South Stoke, Lincs". History of Parliament Online. Retrieved 16 March 2015.