Yes it's Tybalt. "Did Romeo's hand shed Tybalt's blood" yes, it did. Then Romeo lived but was banished he who "Tybalt would have slain. And Tybalt's dead, that would have slain my [Juliet's] husband".
It's not Paris because he's not Juliet's kinsman (her father would arrange for her to marry a family member) he is just a friend of the Capulets.