Old German masc. name that evolved from the Old High German names Warinheri or Werinher.
The first element of the name (weri) may refer to a Germanic tribe; the second part (heri) means “army.”
Wern(h)er has been a popular male name since the Middle Ages.
Famous Germans bearing the name: Werner von Siemens (industrialist), Werner Heisenberg (physicist), Wernher von Braun (rocket scientist).