János' father was János Kis Tóth and his mother was Lídia Csáti. His paternal grandparents were Bálint Kis (Tóth) and Juliána Székely; his maternal grandparents were Csáti and <Unknown>. He had a brother and two sisters, named Gábor, Magdolna and Erzsébet. He was the second youngest of the four children. He died at the age of 24 on December 27th, 1926 in Miskolc.1