Hans Albert Einstein
Hans Albert Einstein was born on May 14, 1904 in Bern, Switzerland, where his father, Albert Einstein, worked as a clerk in the patent office. His father was of German-Jewish descent and his mother, Mileva Marić, Serbian-Orthodox. His younger brother, Eduard Einstein, was born in 1910 and died in 1965. The fate of his older sister, Lieserl Einstein, Albert Einstein's and Mileva Marić's first child, is unknown. Their parents divorced in 1919 after living apart for five years.
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.