Cecily Bonville had many notable descendants, including Lady Jane Grey, Lady Catherine Grey, Elizabeth FitzGerald, Countess of Lincoln, Robert Devereux, 2nd Earl of Essex, Elizabeth Vernon, Frances Howard, Countess of Somerset, Sir Winston Churchill, as well as those who are living today which include Prince William, Duke of Cambridge and Sarah, Duchess of York.
William Bonville, 1st Baron Bonville | Cecily Brown | Cecily von Ziegesar | William Bonville, 6th Baron Harington | Cecily Neville, Duchess of York | Cecily Neville | Cecily of York | Cecily Bonville | Baron Bonville |
William Bonville jnr died along with his father at the Battle of Wakefield in 1460 and the castle fell to his newborn daughter Cecily, who later married Thomas Grey, 1st Marquess of Dorset.
She had an older half-sister Cecily Bonville from her mother's first marriage to William Bonville, 6th Baron Harington who was executed by the command of Queen Margaret of Anjou after the Battle of Wakefield where he fought on the side of the Yorkists.