László was born on July 1st, 1913 in Budapest. László's father was Sándor Asbóth and his mother was Veronika Bodor. His paternal grandparents were György Asbóth and Katalin Keszei. He had two sisters named Margit and Ilona. He was the second oldest of the three children. He had two half-brothers named János and Sándor. He died at the age of 29 on January 8th, 1943.