What nationality is the last name Foss?

The last name Foss is most commonly associated with Scandinavian origins, specifically Norwegian. It likely originated as a topographic surname, meaning "waterfall" or "cataract."

However, it's important to remember that surnames can be found in various cultures and regions due to migration, adoption, and other historical factors. It's possible to find individuals with the last name Foss who have different ethnic backgrounds.