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.
Gustav Peter Bucky
Bucky died in 1963 and he was survived by his wife Frida and two children. In 1967, Bucky's widow decided to auction off a collection of letters from Einstein to Gustav Bucky. One of Bucky's children, Peter A. Bucky, was preparing to write a memoir about the family's relationship with Einstein and he tried to buy the letters, but the collection sold for more than $35,000 and he was outbid.