Stigler’s law of eponymy is a process proposed by University of Chicago statistics professor Stephen Stigler in his 1980 publication “Stigler?s law of eponymy” . In its simplest and strongest form it says: “No scientific discovery is named after its original discoverer.”
“Stigler?s Law was discovered many times before Stigler named it.”
“Everything of importance has been said before by somebody who did not discover it” is an adage attributed to Alfred North Whitehead.
Here is a short list of misnamed theorems.