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).
Bernhard Caesar Einstein
Bernard Einstein was the son of Hans Albert Einstein and Frieda Einstein (née Knecht), who had married in 1927 in Switzerland. He was born on 10 July 1930 in Dortmund, Germany, where Hans Albert was involved in a bridge building project. Hans Albert was the only one of Albert Einstein's three children to marry and have children. Hans Albert's sister, Lieserl Einstein, is assumed to have died in infancy, although it has been suggested that she was given up for adoption. Hans Albert's younger brother Eduard Einstein developed severe schizophrenia in early adulthood and died at age 55, and had no children. Bernard's brother Klaus was born in 1933 and died at age 6 of diphtheria in Clemson, South Carolina. Frieda also had David, who died in early infancy. Eventually, Hans Albert and Frieda adopted a girl, Evelyn, shortly after she was born in 1941. Frieda died in 1958; and one year later Hans Albert married Elizabeth Roboz, a neurochemist.