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).
Mileva Marić
The marriage had been strained since 1912, in the spring of which Einstein became reacquainted with his cousin, Elsa. They began a regular correspondence. Marić, who had never wanted to go to Berlin, became increasingly unhappy in the city. Soon after settling in Berlin, Einstein insisted on harsh terms if she were to remain with him. In 1914, she took the boys back to Zürich, a separation that was to become permanent. Einstein made a legal commitment to send her an annual maintenance of 5600 Reichsmarks in quarterly instalments, just under half of his salary. After the required five years of separation, the couple divorced on February 14, 1919.