Lajos was born in February 1893 in Sáp and his baptism took place there on February 3rd, 1893.1 Lajos' father was Antal Körtvélyesi and his mother was Julianna Dezső. His paternal grandparents were Lajos Körtvélyesi and Sára Csordás. He had a brother and two sisters, named Antal, Karolina and Krisztina. He was the youngest of the four children.