doppelgänger
Concise Oxford English Dictionary © 2008 Oxford University Press:
doppelgänger /ˈdɒp(ə)lˌgɛŋə, -ˌgaŋə/
▶noun an apparition or double of a living person.
– origin C19: from Ger., lit. ‘double-goer’.
'doppelgänger' also found in these Oxford entries:

