Tybalt
It was never stated, though he's a kinsman to Prince Escalus. Neither was Paris's last name, for the record. Benvolio's last name was never specified, though he was from the house of Montagues. He's a cousin of Romeo's, so it's possible they had different last names.
Romeo's cousin is Benvolio. Some people mistake his cousin for Mercutio, but he is the cousin of the prince and Romeo's friend.
Juliet's surname is Capulet. Romeo is a Montague.
His name is Paris, "the County Paris" as they call him.
his servant guy It is Absolutely not his servant guy! That doesn't answer anything! That servant does have a name! The person who told Romeo of Juliet's "DEATH" was Balthasar! And he is the Servant of Romeo!
Tybalt
Tybalt.
Benvolio is A member of the Montague family and Romeo's cousin. He calls Montague "uncle" and greets Romeo "Good morrow, cousin."
Tybalt
Montague
"Tis but thy name which is my enemy." Or, "now old desire doth in his deathbed lie."
No, Benvolio is Romeo's cousin, not his brother. Romeo has no siblings.