Ferenc was born in May 1835 in Eger and his baptism took place there on May 30th, 1835.1 Ferenc's father was Ferenc Körtvélyesy and his mother was Mária Gyenes. His paternal grandparents were József Körtvélyesi and Anna Takács. He had three brothers and a sister, named Ignác, Ignác, János and Mária. He was the youngest of the five children. He had a half-brother named Ferenc.