D. Afonso de Santa Maria, Prince of Beira, Duke of Barcelos (born 25 March 1996) is the eldest son and heir to
Duarte Pio, Duke of Braganza, the current pretender to the defunct throne of Portugal, and thus a member of the Portuguese Royal Family. The first child of the Duke and
Isabel Castro Curvelo de Herédia, the Prince is first in the Line of succession to the former Portuguese throne, behind his father.