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).
Gustav Peter Bucky
Bucky died in 1963 and he was survived by his wife Frida and two children. In 1967, Bucky's widow decided to auction off a collection of letters from Einstein to Gustav Bucky. One of Bucky's children, Peter A. Bucky, was preparing to write a memoir about the family's relationship with Einstein and he tried to buy the letters, but the collection sold for more than $35,000 and he was outbid.