What form of tener do i use for names?

Answer 1

Simple having a name does not give us clear information as to what form of "tener" we should use. What is critical to do is to replace the name with a pronoun and that will give us a clear idea of what form of "tener" we should use.

For example, let's look at the following sentences and their translations into Spanish:

Tom has a book. // He has a book.
Hey Tom, have a book! // Imperative You have a book.
Tom and Max have a book. // They have a book.
I, Tom, have a book. // I have a book.

Tom tiene un libro.
Oye Tom, ¡tengas un libro!
Tom y Max tienen un libro.
Yo, Tom, tengo un libro.