Elizabeth Roboz Einstein
Roboz married Hans Albert Einstein, first son of physicist Albert Einstein, and professor of hydraulic engineering at the University of California, Berkeley, in June 1959. They did not have any children together, although Hans had four children from his first marriage to Frieda Knecht, only two of whom survived into adulthood. Hans died on July 26, 1973, and Roboz wrote a biography of him, "Hans Albert Einstein: Reminiscences of his Life and our Life Together" (1992).
Einstein family
The last time "Lieserl" was mentioned in their extant correspondence was in Einstein's letter of 19 September 1903 (letter 54), in which he showed concern that she had scarlet fever. His asking "as what is the child registered? [Adding] we must take precautions that problems don't arise for her later" may indicate the intention to give the child up for adoption.