The only reason portuguese were limited to Brazil only was due to treaty of Tordesillas. This was why I had suggested the Galician colonization of Newfoundland and gulf of st Lawrence before Columbus Spanish expedition.With a POD all the way back in the 1200s, you could just have the entirety of South America be Portuguese. I mean, shit, with a POD that early you could butterfly away Christian South Iberia in total. I think the answer to your questions depends on what you define as a "Brazilian."
heck with at 12-14th century POD we might not even have Columbus expedition.