Jansson

Jansson is a Swedish surname derived from the given name Jan or Johan, with the patronymic suffix -sson meaning “son of.” It is a variant of the more common Johansson and is found throughout Sweden as well as among Swedish-speaking populations in Finland. The name has spread internationally through migration and has several spelling variants stemming from regional naming practices.

Notable people: The surname is borne by many individuals across the Nordic region and beyond. One internationally recognized bearer is Tove Jansson (1914–2001), the Finnish author and artist who created the Moomins. The name’s distribution reflects Nordic naming traditions, with Jansson appearing in various professions and contexts.

In computing, “jansson” (lowercase) refers to a C library for encoding, decoding, and manipulating JSON data. It is unrelated to the surname and is used in a variety of open-source software projects.

See also: Johansson. The surname Jansson shares roots with other patronymic names formed from fathers’ given names and is part of a broader family of Nordic -sson/-s- suffix surnames.