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.
I’m not a look-alike! is an ongoing project by François Brunelle (featured previously). For the last fourteen years the photographer has been taking black and white portraits of unrelated doppelgängers and he has found and photographed over 230 look-alikes to date. Most people have found him and his project through his website and social media.
You can't make this up. :)