Kolstad
Kolstad is both a Norwegian surname and a toponym used for several places in Norway. Etymology: It derives from kol, meaning "coal," and stad, meaning "place" or "town," indicating a locality associated with coal mining or a coal-producing site. The combination is common in Norwegian toponymy and surnames formed from place names.
Usage as a surname: Kolstad is found among people of Norwegian descent, and communities with Nordic ancestry.
Place name usage: In Norway, Kolstad appears in the names of rural locations, farms, or settlements. It
In sum: Kolstad exemplifies how Norwegian surnames often originate from place names tied to natural resources