Gyula was born on January 14th, 1897 in Aranyos. Gyula's father was András Székely and his mother was Borbála Kohányi. His paternal grandparents were János Székely and Borbála Sebő. He had a brother and two sisters, named Sándor, Lídia and Klára. He was the second oldest of the four children. He died as an infant, gyermekek hasmenése, at 2 months old on March 28th, 1897 in Aranyos.