Thomas Martin Einstein
Albert Einstein had three children, Lieserl Maric (1902–1903?), Hans Albert Einstein (1904–1973), and Eduard "Tete" Einstein (1910–1965), but only Hans Albert is known to have married and had children. Hans Albert's only biological child to survive to adulthood was Bernard Caesar Einstein (1930–2008), who was a physicist and the father of Thomas Martin Einstein.
Edith Hirsch (economist)
Edith Hirsch was born in Berlin, Germany to Adolph and Flora Jarislowsky. She was the third of five siblings. Hirsch received a bachelor's degree from the University of Heidelberg in 1925. She met Julius Hirsch at the childhood home of Albert Einstein's wife, who was a good friend of her mother. They married in 1927 and their only child was born in 1928. In 1933, they emigrated to Copenhagen, and in 1941 they moved to the United States. Hirsch earned a master's degree in social science in 1943 at the New School for Social Research in New York. She and her husband taught at the school throughout the 1940s and 50s. She worked as a consultant for many companies with her husband. In 1961, Julius Hirsch died and Edith closed their consulting firm, although she continued publishing papers. She continued working into her later years. She moved to Washington in 1989 and died on January 7, 2003.