At Infante Ferdinand's death in 1470, all his titles, including both the orders of Christ and Santiago, were inherited by his eldest son, João, Duke of Viseu. But the sickly João died just two years later, in 1472. The mastership of the orders was subsequently separated again: João's younger brother, Diogo, Duke of Viseu became master of the Order of Christ, while the Order of Santiago passed to his brother-in-law, Infante John, the eldest son and heir of Afonso V of Portugal.