or dop·pel·gang·er
noun
- A ghostly double of a living person, especially one that haunts its fleshly counterpart.
- Either of two people who physically resemble each other very much.
Origin of doppelganger
German a double doppel double ( from French double ; see double . ) Gänger goer ( from Gang a going ) ( from Middle High German ganc ) ( from Old High German)