Éva was born on May 22nd, 1925. Éva's father was Ádám Körtvélyessy and her mother was Duci Kohányi. Her paternal grandparents were Ádám Körtvélyessy and Borbála Nádaskay. She had a brother and a sister, named István and Magda. She was the youngest of the three children. She had a half-brother and a half-sister, named Ádám and Klári.