Antonio is Leonato's brother. Antonio is described in the Dramatis Personae as an old man. He is a minor character, but his relationship to Leonato stands as a model of a good fraternal relationship in contrast to that between Don Pedro and Don John. He is an advisor and confidant to his brother.
he has a tendecy to agree in a characteristic way.
antonio is leanato's brothe which means his also hero and beatrice uncle
Antonio is Leonato's Brother.