Claessens is a Dutch patronymic surname meaning "son of Claes (Nicholas)". It may refer to:
- Alain Claessens (1947âÂÂ2004), French actor
- Artus Claessens (fl. 1625âÂÂ1644), Flemish still-life painter
- August Claessens (1885âÂÂ1954), American politician
- (born 1981), Belgian theater and movie actor
- Dieter Claessens (1921âÂÂ1997), German sociologist
- Dominicus Claessens ( â ), Flemish Baroque painter
- François Claessens (1897âÂÂ1971), Belgian gymnast
- Gert Claessens (born 1972), Belgian footballer
- Jean Claessens (1908âÂÂ1978), Belgian footballer
- Lambertus Antonius Claessens (1762âÂÂ1830), Flemish engraver and publisher
- Nastja Claessens (born 2004), Belgian basketball player
- Olivier Claessens (born 1988), Belgian footballer
- Stijn Claessens (born 1959), Dutch economist
- Tony Claessens (born 1989), Dutch EDM producer better known as Tony Junior
See also