Claessen is a Dutch patronymic surname ("son of Claes"). Notable people with the surname include:

• Bart Claessen (born 1980), Dutch dance DJ known as Barthezz
• George Claessen (1909–1999), Sri Lankan artist and poet
• Gustave Claessen (1896–?), Belgian cyclist
• Hans Claessen (1562–1623), Dutch merchant and founder of the New Netherland Company
• Henri J. M. Claessen (1930–2022), Dutch anthropologist
• Roger Claessen (1941–1982), Belgian football player

Claesen

• Ludo Claesen [de; fr; nl] (born 1956), Belgian conductor
• Nico Claesen (born 1962), Belgian football player

• Claessens, surname
• Claassen, surname
• Klaasen, surname
• Klaassen, surname

Surname list

This page lists people with the surname Claessen.
If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.