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.
Bob Einstein
Einstein was born in 1942 in Los Angeles, to a Jewish family. His parents were the comic Harry Einstein, best known for playing the character Parkyakarkus on radio and in the movies, and the actress-singer Thelma Leeds. His younger brother is comedian and writer Albert Brooks (born Albert Lawrence Einstein), and his older brother, Cliff Einstein, is a retired advertising executive in Los Angeles. He was a 1965 graduate of Chapman College.