Dirichlet's Box Principle/Historical Note

Historical Note on Pigeonhole Principle
The Pigeonhole Principle has been attributed to.

It is also known as Dirichlet's Box (or Drawer) Principle, or, as Dirichlet named it, Schubfachprinzip (drawer principle or shelf principle).

In Russian and some other languages, it is known as the Dirichlet principle or Dirichlet's principle, which name ambiguously also refers to the minimum principle for harmonic functions.