"Kommt sie aus Brasilien?"
Translation:Is she from Brazil?
Is any resident irrespective of male/female in Brazil called Brasilien in German?
No. "Brasilien" is the name of the country, Brazil. A Brazilian man is called "Brasilianer", and a Brazilian woman is called "Brasilianerin".
The above sentence literally means "Does she come from Brazil?" ("Is she Brazilian?" would be "Ist sie Brasilianerin?").