Mihály was born on May 5th, 1844 in Sáp and his baptism took place there on May 12th, 1844.1 Mihály's father was József Körtvélyesi and his mother was Rebeka Ritók. His paternal grandparents were András Körtvélyesi and Sára Kurtán. He had three brothers and a sister, named József, András, Bálint and Erzsébet. He was the second youngest of the five children. He had a half-brother and two half-sisters, named Lajos, Mária and Sára. He died at the age of 39 on November 15th, 1883 in Sáp.2