János was born on July 25th, 1754. János' father was Zsigmond Guóth and his mother was Zsuzsa Káldy. His paternal grandparents were Márton Guóth and Judit Morocz. He had four brothers and a sister, named Zsigmond, Sándor, Sándor, József and Éva. He was the second oldest of the six children. He died at the age of 44 on May 9th, 1799.