How do you say my name is Tina in Portuguese?

There are two ways to say "My name is Tina" in Portuguese, depending on the formality:

Formal: Meu nome é Tina.

Informal: O meu nome é Tina.

The informal version "O meu nome" is more common in spoken language, especially among friends and family. The formal version "Meu nome" is used in more formal settings, like professional contexts.