Belgian Roman Catholics

Pierre-Joseph van Beneden FRS FRSE FGS FZS (19 December 1809 – 8 January 1894) was a Belgian zoologist and paleontologist.

Claude Laydu ([klod lɛjdy]; 10 March 1927 – 29 July 2011) was a Belgian-born Swiss actor on stage and in films. He was renowned for his performance in his film debut in the role of the young priest in Robert Bresson's Diary of a Country Priest (1951), which has been described as one of the greatest in the history of film.

Paul Adriaan Jan, Baron Janssen (12 September 1926 – 11 November 2003) was a Belgian physician. He was the founder of Janssen Pharmaceutica, a pharmaceutical company with over 20,000 employees which is now a subsidiary of Johnson & Johnson.