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.
Mileva Marić
In 1903, Marić and Einstein married in Bern, Switzerland, where Einstein had found a job at the Federal Office for Intellectual Property. In 1904 their first son, Hans Albert, was born. The Einsteins lived in Bern until 1909, when Einstein got a teaching position at the University of Zürich. In 1910, their second son Eduard was born. In 1911, they moved to Prague, where Einstein held a teaching position at the Charles University. A year later, they returned to Zurich, as Einstein had accepted a professorship at his alma mater.