János was born in 1934. János' father was Miklós Csölle and his mother was Mária Kósa. His paternal grandparents were Vince Csölle and Julianna Kolláth. He had two brothers and two sisters, named Miklós, József, Teréz and Júlia. He was the second oldest of the five children. He died at the age of 55 in 1989.