Augusto Salazar e Bragança was the son of the unusual marriage of D. Maria Amália de Mendoça Rolim de Moura Barreto and D. João Salazar de Mascarenhas. He was a member of a cadet line of the Portuguese royal family. He married Lilliane de Bayle. They had two sons: João Fernando and Ivan.
The surname Salazar e Bragança was created by D. João Salazar de Mascarenhas for his son.