Its occult meaning notwithstanding, People often use doppleganger for an amazingly similar double. I hear Saddam Hussain had several.Doppelganger
Doppelganger
This term come from the German expression meaning "double walker," the human , or the astral body. The doppelganger may be projected in an out of body experience (OBE), or appear as another person in an apparition. A.G.H.
http://en.mimi.hu/esoteric
Katy