Hello, i am in need of some help . My grandfather was from Brazil and i have a letter that he wrote to his brother. For some reason, they had different last names. I am wonder how to tell what part is the last name! My grand father was Severino Viana. His brother was Antenor Correia ( or Coneia) Lins. Is the Middle part the last name??His brother lived in Miguel Santa Cruz, Joao Passo Brazil ... I am so confused!!