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).
Edwin Einstein
Born in Cincinnati, Ohio, Einstein was son of Lamle 'Lewis' and Judith Einstein. He moved with his parents to New York City in 1846, worked as clerk in a store, and received a collegiate training in the College of the City of New York. He entered Union College, but did not graduate, and continued in mercantile pursuits. He married Fanny Hendricks. He went into a partnership with Louis Hirschhorn founding a cigar manufacturing business named "Hirschhorn & Einstein".