Erzsébet was born on October 23rd, 1806 in Keresztes Fejér vm.1 Erzsébet's father was János Kossa and his mother was Zsófia Márkus. His paternal grandparents are István Kósa and <Unknown>. He had a brother and two sisters, named Gábor, Julianna and Éva. He was the youngest of the four children.