Thomas Grey, 1st Marquess of Dorset

He was the elder son of John Grey (c.1432-1461) of Groby in Leicestershire, by his wife Elizabeth Woodville, who later became queen consort to King Edward IV.

Later in the summer, learning of the apparent murder of both his young half-brothers, Grey joined the Duke of Buckingham's rebellion against Richard III.

When the rebellion failed he fled to Brittany to join Henry Tudor, who pledged to marry Grey's half-sister Elizabeth of York and heal the division between the Yorkists and the Lancastrians.

Thomas Grey was confined in the Tower in 1487 during Lambert Simnel's rising and not released until after the House of Tudor victory at the Battle of Stoke Field.

Thomas Grey, Marquess of Dorset, died in London on 20 September 1501, aged about 46, and was buried in the collegiate church of Astley, Warwickshire.

His mother-in-law was the second child and eldest surviving daughter of Richard Plantagenet, 3rd Duke of York, and Cecily Neville, thus sister to his mother's second husband King Edward IV.