Moster

Moster is a term with several uses in Nordic contexts, most commonly as a place name in Norway, as well as a family relationship term and a surname.

Moster is an island in the municipality of Bømlo, Vestland county, on the southwestern coast of Norway. The island hosts Moster Church, a historic parish church associated with the area’s medieval heritage. The community on Moster is small and rural, and the island forms part of the Sunnhordland region.

In Danish and Norwegian, moster is the term for a mother's sister, i.e., a maternal aunt. The word is part of everyday speech and writing in those languages, reflecting kinship terminology.

As a surname, Moster is found in Nordic countries. It appears in public records and genealogical sources and is carried by individuals and families in Norway and other Nordic regions.