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.
Einstein family
Maria "Maja" Einstein and her older brother, Albert, were the two children of Hermann Einstein and Pauline Einstein (née Koch), who had moved from Ulm to Munich in June 1881, when Albert was one. There Hermann and his brother Jakob had founded "Einstein & Cie.", an electrical engineering company.