doppelgänger

n. double, counterpart of a person (from German)

A doppelgänger or fetch is the ghostly double of a living person, a sinister form of bilocation.In the vernacular, "Doppelgänger" has come to refer (as in German) to any double or look-alike of a person—most commonly an "evil twin". The essential meaning of the German word is "doublewalker", someone who is walking the same way as another person. The word is also used to describe the sensation of having glimpsed oneself in peripheral vision, in a position where there is no chance that it could have been a reflection. They are generally regarded as harbingers of bad luck. In some traditions, a doppelgänger seen by a person's friends or relatives portends illness or danger, while seeing one's own doppelgänger is an omen of death. In Norse mythology, a vardøgr is a ghostly double who precedes a living person and is seen performing their actions in advance.
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Noun
1. a ghostly double of a living person that haunts its living counterpart
(hypernym) legendary creature

n. double, stunt actor

[Folklore] The frightful image seen at the window, or staring back from the mirror, could be your own--a double, or doppelgänger (from the German for "double goer"), the sight of which could foretell your own imminent demise. Sometimes described as the soul embodied, sometimes an astral projection or aura, the double most often presented itself as a warning. Queen Elizabeth I reportedly saw a vision lying on her deathbed, pale and still, soon before she died. Geothe and Shelley also claimed to have seen their doubles, and when Catherine the Great of Russia saw her own coming toward her, she took no chances and ordered her soldiers to shoot at it. Witches, it was long accepted, could project their own doubles and set them loose to do mischief far and wide. As a result, many a women was hanged as a witch even though it could be proven beyond a shadow of a doubt that she was somewhere else entirely when the barn burned down, the cow died or whatever else had happened that she was now charged with...
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