Körtvélyesi was born on June 16th, 1860. Körtvélyesi's father was Gábor Körtvélyesi and his mother was Júlia Ványi. His paternal grandparents were Ferenc Körtvélyesi and Sára Sápi. He had a brother and a sister, named Gábor and Julianna. He was the second oldest of the three children. He had a half-sister named Ágnes. He died on June 16th, 1860.