` :Because none of Augusto (Pedro II's grandson)'s children were neither Brazilians nor married to royals. It has been said that a daughter of his (from which the Saxe-Coburg that live in Brazil are descendants) was Brazilian, but that's not true. Brazil did not accept dual citizenship until 1994. It would make no sense to Augusto register only one daughter as Brazilian anot not the other children, including the male ones. And if she became Brazilian later, that wouldn't change anything. You're born Brazilian and born Prince. You can not become Brazilian later and then become a Brazilian prince. Anyway, this line never married to royals. Lastly, I don't understand this ``Petrópolis`` and ``Vassouras`` line. This was created by newspapers in 1993 during the plebiscite, because anyone who was descendant of Pedro II showed up putting him/herself as a cadidate to the throne. So, to make everything easier, the newspapers placed them into categories: the ones that came from Petropolis and the ones who came from Vassouras.   `