Not really.
The nobility in Brazil was very small and much smaller when compared to European standards. Since nobilitiy in Brazil was not hereditary and it was granted according to merit, and not family status, we do not have "claimants" to any nobility titles in Brazil nowadays.
That is correct. Here in Brazil, we used to be Portugal's colony, and after our Independence, we only had two Emperors (D. Pedro I and D. Pedro II), and then we became a Republic. We still have some survivors, some people who still uses the name of "Count", or "Baron", but nothing legal. Actually, we have some claimants of the brazilian throne, but that's nothing that concern us, really, they won't get to the throne. They are the descendants of Isabel de Braganza, daughter of D. Pedro II, and her husband, Count D'Eu, and they use titles as "Prince of Orleans and Braganza". The most famous princess here is Paola de Orleans and Braganza. if you want some information, there's a good website:
http://www.monarquia.org.br/