What does MJK mean in Unclassified?

Mary Jane Kelly

Mary Jane Kelly (c. 1863 – 9 November 1888), also known as Marie Jeanette Kelly, Fair Emma, Ginger, Dark Mary, and Black Mary, is widely believed to have been the final victim of the notorious unidentified serial killer Jack the Ripper, who killed and mutilated several women in the Whitechapel area of London from late August to early November 1888. She was about 25 years old, and living in poverty at the time of her death.

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