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).
Maximilian Herzberger
Maximilian Herzberger was the son of Leopold Herzberger (born 7 Mar 1870, Krefeld — died in Rochester (NY)) and Sonja/Sofia Behrendt/Berendt/Berends (22 Mar 1876, Petersburg (Germany) — 28 Jan 1945, Florence); he had a sister Olga (24 Sep 1897, Berlin — 2 Aug 1922, Berlin). The family was Jewish.
He studied mathematics and physics at the Berlin University, where Albert Einstein was one of his professors, and later became a friend and advisor.
In 1923, Herzberger finished his Ph.D. thesis "Ueber Systeme hyperkomplexer Grössen" under Ludwig Bieberbach and Issai Schur at the philosophical faculty.
In 1925, he married Edith Kaufmann (10 Oct 1901, Stuttgart — 16 Feb 2001, Carlsbad (California) or New Orleans);
they had three children, born in Jena, viz. Ruth (born 1928), Ursula Bellugi (1931), and Hans (6 Aug 1932, spouse of Radhika Herzberger).
No later than Sep 1930, he was assistant of Hans Boegehold, the chief of calculation office at Carl Zeiss Jena.