Janssonin

Janssonin is the genitive form in Finnish of the Swedish surname Jansson. It is used to express possession or a close connection to a person or family named Jansson, and it appears routinely in noun phrases that identify ownership, origin, or attribution. For example, Janssonin talo means “the house of Jansson” or “Jansson’s house.”

Origin and etymology: Jansson is a Swedish patronymic surname formed from the given name Johan/Johannes, meaning “son of Johan.” In Finnish, the possessive suffix -in attaches to proper nouns to form a genitive, so Janssonin is the Finnish genitive form of Jansson and is used where Finnish requires a possessive construction.

Usage in Finnish: Janssonin does not function as an independent noun; it forms part of a larger noun phrase. It can refer to a person or family identified by the surname, or to objects associated with that person or family, especially in historical or genealogical contexts. In standard Finnish prose, it follows the normal capitalization rules for proper nouns.

Contexts and notes: The form is commonly encountered in archival documents, pedigrees, and locality references where a person or family named Jansson is being identified or described. It illustrates a broader pattern in Finnish of forming genitive phrases from foreign or Swedish-origin surnames by adding the -in suffix.

See also: Jansson (surname); Finnish grammar; Genitive case.