Westenberg is a Dutch toponymic surname, literally meaning "west of the mountain" or "west of the hill." It is formed from the Middle Dutch elements west and berg ("mountain, hill"), indicating a person who lived to the west of a notable hill or mountain. The name belongs to a class of surnames that describe geographic location, often originating as a dwelling-name for someone residing in a particular area. In some cases, Westenberg may also have arisen as a habitational name from a place named Westenberg, though no major Dutch locale by that name is attested. The name likely first emerged in the Netherlands during the late Middle Ages, when hereditary surnames became more common. Notable bearers of the surname include Hans Westenberg (1898–?), a Dutch-Indonesian agriculturist known for his work in colonial Indonesia, and Robert Westenberg (born 1953), an American actor, acting teacher, and academic who performed on Broadway and taught at institutions such as the Boston Conservatory. A Swedish variant of the name is Westerberg, which carries a similar meaning ("west mountain") and is found predominantly in Sweden. Both surnames share the same geographic origins in the Scandinavian and Low Countries naming traditions. Distribution and Prevalence The surname Westenberg is most commonly found in the Netherlands, with smaller clusters in Flanders (Belgium) and in Dutch diaspora communities, particularly in North America and Indonesia. In the United States, the name is rare but preserved among descendants of Dutch immigrants. Meaning: "west of the mountain" Origin: Dutch Type: toponymic (location-based) Usage regions: Netherlands, Flanders, Dutch diaspora