This is the 7587th most frequent Portuguese word.
osvaldo
"Osvaldo" is a Portuguese given name and does not have a specific standalone definition.
In this sentence, 'Osvaldo' is used as a proper noun representing a person's first name.
Osvaldo é um nome comum no Brasil.
Osvaldo is a common name in Brazil.
Here, 'Osvaldo' is again a proper noun, and the possessive form indicates that Osvaldo owns the dog mentioned.
O cachorro do Osvaldo fugiu ontem.
Osvaldo's dog ran away yesterday.
In this context, 'Osvaldo' is used to specify the name of a person who was met.