To shut up and behave himself.
Yes Tybalt is a Capulet he is Lord Capulet's nephew.
Tybalt is associated with the Capulets, and he thinks of himself as a Capulet, but he is actually not a Capulet at all. He is the son of Lady Capulet's brother, and Lady Capulet is only a Capulet by marriage. That is why it is Lady Capulet, and not Lord Capulet, who is so furious with Romeo after he kills Tybalt.
Tybalt
Capulet prevents Tybalt from fighting Romeo at the party.
On the Capulet side, Tybalt, Lady Capulet, and Paris died. Tybalt was killed by Romeo, Lady Capulet died of grief, and Paris was killed by Romeo in a duel.
Tybalt recognizes Romeo, a Montague, at his uncle, Lord Capulet's, party, and believes Romeo intends to insult the Capulet family.
Tybalt was upset at the party because Romeo arrived at the Capulet party. Tybalt believes that Romeo is mocking him and the Capulet name by arriving at the party. He attempts to fetch his rapier but his uncle, Lord Capulet stops Tybalt.
This would be Tybalt. Of course Capulet is really only his uncle by marriage. Tybalt is Lady Capulet's brother's son. Tybalt does not actually plan to ask for Capulet's permission to throw Romeo out; he calls for his rapier without consulting Capulet first. It is only when Capulet asks him what the heck he thinks he's doing that he explains himself to Capulet.
Tybalt's last name is never mentionned in the play. However, we do know he is the nephew of Lady Capulet.
Capulet and Tybalt quarrel primarily due to Tybalt's anger at Romeo's presence at the Capulet party. Tybalt wants to confront Romeo and challenge him for intruding, but Capulet prevents this, insisting that Romeo is behaving decently and should be left alone. This conflict highlights the generational divide between Capulet, who prioritizes peace and social decorum, and Tybalt, who is hot-headed and driven by family honor. Their disagreement sets the stage for the escalating violence in the play.
Juliet, Romeo, Tybalt, Nurse, Benvolio Or . . . Juliet, Romeo, Friar Lawrence, Nurse, Capulet Or . . . Juliet, Romeo, Friar Lawrence, Capulet, Tybalt Or . . . Juliet, Romeo, Capulet, Mercutio, Tybalt Or basically Romeo and Juliet and any three of Nurse, Friar, Capulet, Mercutio, or Tybalt.
I think Lord Capulet say to Tybalt, come down .Because he don't want people to fighting at his party.