Mihály was born in October 1825 in Bakonszeg and his baptism took place there on October 16th, 1825.1 Mihály's father was István Körtvélyesi and his mother was Rebeka Nemes. His paternal grandparents were Sámuel Körtvélyesi and Borbála Szabó. He had two brothers and two sisters, named Gábor, Mihály, Rebeka and Mária. He was the second oldest of the five children. He died as an infant.