"Sigurd (Old Norse: Sigurðr [ˈsiɣˌurðz̠]) or Siegfried (Middle High German: Sîvrit) is a legendary hero of Germanic heroic legend, who killed a dragon and was later murdered. It is possible he was inspired by one or more figures from the Frankish Merovingian dynasty, with Sigebert I being the most popular contender. Older scholarship sometimes connected him with Arminius, victor of the Battle of the Teutoburg Forest. He may also have a purely mythological origin. Sigurd's story is first attested on a series of carvings, including runestones from Sweden and stone crosses from the British Isles, dating from the eleventh century." - (en.wikipedia.org 11.08.2021)
