Gjenganger
In Nordic folklore; Danish: genganger, Norwegian: gjenganger, Swedish: gengångare ("(a)gain-walker"), among more, is a term for a revenant or ghost, meaning "someone which goes again", from the Scandinavian verb of "going again" (Norwegian: gå igjen, Swedish: gå igen) in the sense, of a deceased walking beyond the grave, haunting post-mortem; compare German: Wiedergänger ("Re-walker").
Other forms include: Icelandic: afturganga, Norwegian: attergangar, stemming from Old Norse: aptrgangr ("re-walker"); Danish: genfærd, Norwegian: gjenferd ("again-travel or after-journey").