- Tatum, Edward Lawrie Tatum - United States biochemist who discovered how genes act by regulating definite chemical events (1909-1975)
--1 is a kind of biochemist
- Tatum, Art Tatum, Arthur Tatum - United States jazz pianist who was almost completely blind; his innovations influenced many other jazz musicians (1910-1956)
--2 is a kind of jazz musician, jazzman