Portuguese surnames
Portuguese-speaking people often use two surnames: the first is the mother's family name, the second the father's, sometimes joined by y (and).
It is never incorrect to give both, but often one is dropped. Usage varies within families; follow the individual's preference if this can be learned. If not, follow these general guidelines:
Senhor José Almeida Rebouças
His wife: Senhora Rebouças
Senhor Rebouças (not Senhor Almeida)