Ágnes was born on October 12th, 1858 in Földes. Ágnes' father was János Körtvélyesi and her mother was Julianna Bíró. Her paternal grandfather was János Körtvélyesi and her paternal grandmother is <Unknown>. She had a brother and two sisters, named János, Eszter and Júlia. She was the oldest of the four children. She died at the age of 58 on March 5th, 1917.