When did John Jane Doe originated?

The term "John Doe" originated in England during the 14th century as a placeholder name in legal contexts, particularly in cases involving anonymity or unidentified parties. It has since evolved into a generic term for an average or typical male, similar to "Jane Doe" for females. The names are often used in legal, medical, and other contexts to refer to individuals whose true identities are unknown or must be withheld.