- Thompson, Homer Thompson, Homer A. Thompson, Homer Armstrong Thompson - United States classical archaeologist (born in Canada) noted for leading the excavation of the Athenian agora (1906-2000)
--1 is a kind of archeologist, archaeologist
- Thompson, Benjamin Thompson, Count Rumford - English physicist (born in America) who studied heat and friction; experiments convinced him that heat is caused by moving particles (1753-1814)
--2 is a kind of physicist