János was born in January 1784 in Tállya and his baptism took place there on January 10th, 1784.1
Birth Notes
https://www.familysearch.org/ark:/61903/3:1:939J-X5WN-P?view=index&personArk=%2Fark%3A%2F61903%2F1%3A1%3AXC54-3SG&action=view nincs feleség, nincs keresztszülő
János' father was Mihály Körtvélyesi. He was an only child. János is no longer alive.