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).
Alfred Einstein
While one source (1980) lists Alfred as a cousin of the scientist Albert Einstein, another claims (1993) that no relationship has been verified. Some websites claim they were both descended from a Moyses Einstein seven generations back, hence they were sixth cousins. Alfred's daughter Eva maintains that they were not related. On the other hand, Alfred's daughter Eva wrote in 2003 that they were fifth cousins on one side, and fifth cousins once removed on the other, according to research by George Arnstein. They were photographed together in 1947 when Albert Einstein received an honorary doctorate from Princeton, but they did not know that they were distantly related.