Birger is a Scandinavian name from Old Norse, bjarga, meaning "to help, to save, to protect". It is widely used in Norway as Birger but also as Børge. The Swedish variant of Birger would soon evolve into Börje, however, the prior form would remain common, and was not confused with its successor. The Icelandic form is Birgir. Birger is primarily a masculine given name, but can also be found as a surname. Birger. Given name. Middle Ages. Birger, King of Sweden (1280–1321) Birger Brosa (died 1202), Swedish jarl. Birger Gregersson (c. 1327 – 1383), Archbishop of Uppsala.
https://en.wikipedia.org/wiki/Birger