doubleganger

Partial calque of German Doppelgänger, equivalent to double +‎ ganger.

doubleganger (plural doublegangers)

1. A doppelganger.
   • 1866, C[harles] Kingsley, “How Hereward Cleared Bourne of Frenchmen”, in Hereward the Wake, “Last of the English.” […], volume I, London; Cambridge, Cambridgeshire: Macmillan and Co., →OCLC, page 358:

     Either you are Hereward, or you are his doubleganger. You speak like Hereward, you look like Hereward. Just what Hereward would be now, you are.