The MathWorld entry for [Fermat's Little Theorem][1] claims "Fermat's simple theorem" has been used as an alternate name.  Also the entry for [Fermat's Congruence][2] consists of a link to the Fermat's Little Theorem page.


  [1]: http://mathworld.wolfram.com/FermatsLittleTheorem.html
  [2]: http://mathworld.wolfram.com/FermatsCongruence.html