Doppelgänger is a keyword in one of the Wendy McMurdo's projects called 'in a shaded place'. I've put some information about this word:
In fiction and folklore, a doppelgänger (German "double walker") ( is a paranormal
double of a living person, typically representing evil or misfortune.
In modern vernacular, the word has come to refer to any double or
look-alike of a person. The word also is 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. Doppelgängers often are perceived as a sinister form of bilocation and are regarded by some to be 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.
