Here is the logic. If someone starts talking with you, then they have to use either an ÖN form or a TE form. Which of the two it happens to be is obvious when they use NÉV... mi a neved is TE, mi a neve is ÖN. With HÍV it is less obvious to the language learner. Verbs have definite or indefinite conjugations, and engem minket téged titeket always take INdefinite, whereas ÖN ÖNT always take definite. So if I say hogy hívnak, I am using INdefinite, and can only mean "how do they address you(TÉGED/TITEKET)=what is your name ", and if I say hogy hívják, I am using definite, and can only mean "how do they address you(ÖN/ÖNT)=what is your name"