Isn't the Y chromosome G2A inherited only in patrineal line? If so, how could the Duke of Bragança have a male Bourbon chromosome? Anyway, the Duke of Bragança is very brave. There has always been gossips that his male ancestor, D. Miguel was not really son of D. João VI. It's been suggested that Miguel I was the son from an affair between his mother, Queen Carlota Joaquina (a Bourbon) and one of lovers.