Sándor was born on February 20th, 1883 in Monor and his baptism took place there on February 26th, 1883.12 Sándor's mother was Etelka Julianna Peterdi. His maternal grandparents were János Peterdi and Borbála Csóbod. He had a brother named Elek. He was the younger of the two children. He died at the age of 1 on September 16th, 1884 in Monor.1