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.
Albert Brooks
Brooks was born Albert Lawrence Einstein into a Jewish showbiz family in Beverly Hills, California, to Thelma Leeds (née Goodman), a singer and actress, and Harry Einstein, a radio comedian who performed on Eddie Cantor's radio program and was known as "Parkyakarkus". His brothers are the late comedic actor Bob Einstein, better known as a character he created named "Super Dave Osborne", and for a recurring role in "Curb Your Enthusiasm"; and Cliff Einstein, a partner and longtime chief creative officer at Los Angeles advertising agency Dailey & Associates. His half-brother was Charles Einstein, a writer for such television programs as "Playhouse 90" and "Lou Grant". His grandparents emigrated from Austria and Russia. He grew up among show business families in southern California, attending Beverly Hills High School with Richard Dreyfuss and Rob Reiner.