Claessens

Claessens is a Dutch patronymic surname meaning "son of Claes (Nicholas)". It may refer to:


 * Alain Claessens (1947–2004), French actor
 * Artus Claessens (fl. 1625–1644), Flemish still-life painter
 * August Claessens (1885–1954), American politician
 * (born 1981), Belgian theater and movie actor
 * Dieter Claessens (1921–1997), German sociologist
 * Dominicus Claessens (c. 1625 – c. 1690s), Flemish Baroque painter
 * François Claessens (1897–1971), Belgian gymnast
 * Gert Claessens (born 1972), Belgian footballer
 * Jean Claessens (1908–1978), Belgian footballer
 * Lambertus Antonius Claessens (1762–1830), Flemish engraver and publisher
 * Olivier Claessens (born 1988), Belgian footballer
 * Stijn Claessens (born 1959), Dutch economist