Duke of Cadaval
The Dukes of Cadaval have their origins in Dom Álvaro of Braganza, Lord of Tentúgal, Póvoa, Buarcos and Cadaval, 4th male son of Dom Ferdinand I, 2nd Duke of Braganza. Dom Álvaro married Dona Filipa de Melo, the rich daughter and heir of Rodrigo Afonso de Melo, 1st.