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
Maria "Maja" Einstein and her older brother, Albert, were the two children of Hermann Einstein and Pauline Einstein (née Koch), who had moved from Ulm to Munich in June 1881, when Albert was one. There Hermann and his brother Jakob had founded "Einstein & Cie.", an electrical engineering company.