- Fourier, Jean Baptiste Joseph Fourier, Baron Jean Baptiste Joseph Fourier - French mathematician who developed Fourier analysis and studied the conduction of heat (1768-1830)
--1 is a kind of mathematician; physicist
- Fourier, Charles Fourier, Francois Marie Charles Fourier - French sociologist and reformer who hoped to achieve universal harmony by reorganizing society (1772-1837)
--2 is a kind of sociologist