Family
- father Angelo Bartlett Giamatti: Yale University professor who later became president of the university; also served as president and later commissioner of Major League Baseball; died in 1989 at age 51
- mother Toni Giamatti: Taught at Hopkins School in Connecticut
- brother Marcus Giamatti: Born Oct. 3, 1961; married to actor Kathryn Meisle
- sister Elena Giamatti: Younger
- son Samuel Giamatti: Born c. 2001; mother, Elizabeth Cohen
