 However, by his mother's second marriage Sir John Radcliffe was a stepbrother of the Earl of Arundel's three children by his first marriage to Katherine Grey (b. in or after 1509, d. 1542), second daughter of Thomas Grey, 2nd Marquess of Dorset (1477–1530), and his second wife, Margaret Wotton.Radcliffe was knighted on 22 February 1557.He appears to have had literary interests.