1. The surname Lang evolved from the Manchu word niohe, which was translated as wolf in Chinese, and evolved into Lang, which is used as a surname.
2. Most of the Manchu Lang surnames are Niugulu. Due to different dialects, some are also called Niuhele. They all have the same meaning and are all transliterations of Manchu lang. The actual surname was Wolf, which was later changed to Lang.