Lang is of Germanic origin, meaning "tongue" or "speech". It's derived from the Old Norse word "langi", which translates to long. This name was popular among various Germanic tribes and is considered a patronymic surname, originally denoting someone who was tall or had a long beard. Today, Lang is more commonly found as a given name for boys in many English-speaking countries.
The name Lang experienced fluctuations in popularity over the years, with a notable peak in the late 1960s to early 1970s and again in the mid-1980s.