 After Arthur Plantagenet's death in 1542, Henry VIII granted the viscountcy to Elizabeth Grey's eldest son by her first marriage, John Dudley, 1st Viscount Lisle, "by the right of his mother".He was created Viscount Lisle on 12 March 1542, and was later created Duke of Northumberland.He forfeited his titles upon his execution and attainder in 1553.