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).
Sergey Konenkov
In 1935 he was commissioned by the Princeton University to do a sculpture of Albert Einstein. It is said that Einstein was interested in the work of the Russian sculptor, but was more focused on his wife, Margarita Konenkova. Einstein and Margarita, who also was acquainted with the physicist Robert Oppenheimer, allegedly had a love affair, judging by the "nine of the great scientist's apparently genuine love letters, written in 1945 and 1946." There have been allegations that Margarita was working in those years for the Soviet Government, but no concrete evidence has been provided to support the theory.