László was born on July 1st, 1855 in Tiszabura.1 László's father was István Körtvély and his mother was Sára Tarkó. He had a sister named Klára. He was the younger of the two children. He had two half-brothers and two half-sisters, named János, Sándor, Mária and Sára. He died at the age of 60 on November 25th, 1915 in TIszabura.2