Agnes Howard, Duchess of Norfolk Agnes Howard, Duchess of Norfolk Agnes Howard (née Tilney) (c. 1477 – May 1545) was the second wife of Thomas Howard, 2nd Duke of Norfolk. Two of King Henry VIII's Queens were her step-granddaughters, Anne Boleyn, and Catherine Howard. After her mother's death, Catherine Howard was in the Dowager Duchess's care during her youth, and as a result of the Duchess's lax guardianship, committed sexual indiscretions while in the Duchess's household which led to her execution as Queen. Agnes' brother, Sir Philip Tilney of Shelley (d.1533), was the paternal grandfather of Edmund Tilney (1535/6–1610), Master of the Revels to Queen
Catherine Howard 1537. Margaret Douglas died in March 1578, age 63. Her grandson James Stewart became king of both Scotland and England. Other exist, mostly showing her decades after these portraits were painted. The portrait shown on this page, attributed to Hans Holbein, dated circa 1535–1540, is exhibited at the Toledo Museum of Art as "Portrait of a Lady, Probably a Member of the Cromwell Family" (1926.57). Another version of the portrait, now located at Hever Castle, dating from the 16th century, is exhibited as Queen Catherine Howard. The National Portrait Gallery exhibits a similar painting, "Unknown Woman, Formerly Known as Catherine