Jansen

Jansen is a surname of Dutch origin. It is a patronymic form meaning “son of Jan,” with Jan being the Dutch form of John. The suffix -sen indicates a paternal lineage, a common pattern in Dutch and other Germanic naming traditions. Consequently, Jansen historically denoted someone descended from an male ancestor named Jan.

Variants and related spellings include Janssen and Janssens (which use a double s) as well as Jansen with a single n. In other languages or regions, equivalents include Janson, Janzen, and Jans, among others. The choice of spelling often reflects regional orthography and immigration history.

Geographic distribution: The surname is most prevalent in the Netherlands and in Dutch-speaking Belgium. It is also found among German communities and among descendants of Dutch and Flemish emigrants in the United States, Canada, Australia, and other countries.

Notable people: The surname is widely borne by individuals across many domains, including politics, science, sports, and the arts. Because of its frequency, no single figure defines the name.

Toponyms and institutions: Jansen appears in some place names and organizational names in areas with Dutch heritage. This article focuses on the surname rather than specific locations.

See also: Janssen (surname) — a closely related Dutch form.