Ágnes was born on January 7th, 1828. Ágnes' father was József Körtvélyesi and her mother was Erzsébet Szabó. Her paternal grandparents were János Körtvélyesi and Zsuzsanna Varga. She had a brother and two sisters, named Mihály, Rozália and Barbara. She was the youngest of the four children. She died at just 10 days old on January 17th, 1828.