doppelganger; double
Refers to a ghostly or supernatural double of a living person, often seen as an omen of death or misfortune.
He claims he saw his own doppelganger on the road at night.
Compound of 二重 (double) and 身 (body, self). The exact origin is uncertain, but it likely emerged as a native Japanese term for the Western concept of a doppelganger.