John Doe Meaning
(idiomatic) Any unknown or anonymous male person.
Example: A fictitious name used in the legal documents for an unknown or anonymous male person.
1885: i.e. "to Tom, Dick or Harry:" the names like John Doe and Richard Roe are used indefinitely in Arab. â€” The Book of the Thousand Nights and a Night, Vol. 4 Footnote 5, Richard Burton