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.
Milan N. Popović
Milan Popović has been doing psychohistorical studies of Mileva Marić-Einstein, especially concerning her relationship with her husband Albert Einstein. This study is based on the presentation and analysis of about 70 letters and postcards which Mileva Marić, and some of them Albert Einstein too, addressed to Helena Savić (grandmother of Milan Popović), their close friend and colleague from studies in Zurich. These letters are significant for better understanding of the relationship evolution of the Einstein couple, as well as for psychology of this ingenious man.