Jocasta "Joyce" Culpeper, of Oxon Hoath (c. 1480 – c. 1528) was the mother of Katherine Howard, the fifth wife and Queen consort of King Henry VIII.
Joyce Culpeper, born about 1480, was the daughter of Sir Richard Culpeper (d. 4 October 1484) and his second wife, Isabel Worsley (born c. 1450 – 18 April 1527), the daughter of Otewell Worsley of Southwark, Surrey, by Rose Trevor.
However, only Joyce and Margaret are named as co-heiresses to their brother, Thomas, in the inquisition post mortem taken after his death,[5] and it seems clear that Margaret was Joyce Culpeper's only sister by her mother's marriage to Sir Richard Culpeper.
[6] After Richard Welbeck's death, Margaret Culpeper married William Cotton, esquire.
[30] After Joyce Culpeper's death, Lord Edmund Howard married secondly, Dorothy Troyes, daughter of Thomas Troyes of Hampshire, and widow of Sir William Uvedale (d.1529), and thirdly, before 12 July 1537, Margaret Munday, daughter of Sir John Munday, Lord Mayor of London, and widow of Nicholas Jennings, but had no issue by either marriage.