Gjenganger

The gjenganger concept appears in Viking‑age saga material (e.g., Grettis saga, Eyrbyggja saga, The Saga of Eric the Red) and in later Scandinavian folk belief. Etymologically the name combines a prefix meaning 'again' (Old Scandinavian gen-/gjen-/atter/aptr) with a stem meaning 'walker' or 'traveler' (-ganger, -gångare, -færd), encoding the notion of a person who walks again after death. Saga‑age references present aggressive, corporeal revenants often called draugr, while later folklore layers Christian and social explanations (murder victims, suicides, those with unfinished business) onto the phenomenon.

In older saga sources the gjenganger is described as taking on an entirely corporeal form, lacking spectre‑like transparency and capable of physical interaction; saga examples (such as the encounter in Grettis saga where Grettir fights the revenant Glámr) situate it among draugr‑type figures. In later Swedish folklore the gengångare is described as looking virtually identical to a living human, distinct from the gast (which is transparent or skeletal). Over time modern usage sometimes equates the gjenganger with the more ethereal spøkelse/ghost, yielding a range from solid, humanlike revenant to non‑corporeal apparition.

Motives for return include murder, suicide, or unfinished obligations; gjengangere may come back to complete tasks or to avenge wrongs. Older tradition emphasizes malicious, violent behavior and physical attacks — saga narratives record hand‑to‑hand or weapon combat against revenants — while later folklore includes disease‑spreading and nocturnal assault (the 'dead man's pinch' / dødningeknip). In some accounts relatives could assist revenants with unfinished business, and in later periods the figure sometimes softens into a less violent, ghost‑like presence.