dop·pel·gäng·er
ˈdäpəlˌgaNGər/
noun
an apparition or double of a living person.
"he has a doppelgänger named Donald, his invented twin brother"
Twisted Sifter does it again with 15 pix of doppelgangers. Astounding to say the least.
You can't make this up. :)