István was born on September 4th, 1922. István's father was Ádám Körtvélyessy and his mother was Duci Kohányi. His paternal grandparents were Ádám Körtvélyessy and Borbála Nádaskay. He had two sisters named Magda and Éva. He was the oldest of the three children. He had a half-brother and a half-sister, named Ádám and Klári. He died at the age of 79 in 2001.
General Notes
felesége: Oruzinska Éva. Az Istvánnal beszéltem (?)