This is the 8442nd most frequent Portuguese word.
viviana
"Viviana" is a feminine given name in Portuguese, equivalent to "Vivian" in English.
In this sentence, 'Viviana' is a proper noun used as the name of the subject being described.
Viviana é uma pessoa muito gentil.
Viviana is a very kind person.
Here, 'Viviana' is a proper noun referring to the individual who performed the action of giving the book.
O livro que Viviana me deu é fascinante.
The book that Viviana gave me is fascinating.
In this example, 'Viviana' is the subject of the sentence, described as enjoying a specific activity.