- French composer, born in Belgium.
- U.S. physicist, born in Germany: Nobel Prize 1925.
- César (Auguste) (sezar). 1822–90, French composer, organist, and teacher, born in Belgium. His works, some of which make use of cyclic form, include a violin sonata, a string quartet, the Symphony in D Minor (1888), and much organ music
- James . 1882–1964, US physicist, born in Germany: shared a Nobel prize for physics with Gustav Hertz (1925) for work on the quantum theory, particularly the effects of bombarding atoms with electrons
