Green’s Dictionary of Slang

the female version of John Doe n.

1913		Day Book (Chicago) 12 Nov. 21/2: I John Doe while asking Jane Doe to become his wife, should say [etc.].
1972		Smith & Gay Heroin in Perspective 13: A lot of them sign on as ‘Jane Doe’.
1989		P. Benchley Lush 110: By now she’d be one more Jane Doe rotting in a potter’s field somewhere.
1997		A. Highcrest At Home on the Stroll 113: I’m sure that Brian Whitehead did what he did to Jane Doe because he believed she was just some dumb hooker.
2003		Simon & Burns ‘Collateral Damage’ Wire ser. 2 ep. 1 [TV script] The day before yesterday I fished out a Jane Doe from near the bridge.
2013		Jamaica Obs. On Line 18 Aug. 🌐 No justice for 13-year-old rape vioctim. ‘Jane Doe’, 13, was a happy and bright child.