Klaassen

Klaassen is a Dutch patronymic surname meaning "son of Klaas," with Klaas being the Dutch form of Nicolaas (Nicholas). The name originated from a common practice of forming family names from a father’s given name. The surname is widespread in the Netherlands and is also found among Dutch-speaking communities abroad.

Variants of the surname include Klaasen, Klaassen, and Claassen.

Notable people with the surname include Davy Klaassen (born 1993), a Dutch professional footballer who has played for Ajax and the Netherlands national team. The name is carried by other individuals in various fields, reflecting its Dutch origins and broader presence in sports and public life.

See also: Klaas (given name); Claassen (surname) for related forms.