Source : Webster's Revised Unabridged Dictionary (1913)

Iroquois \Ir`o*quois"\, n. sing. & pl. [F.] (Ethnol.)
   A powerful and warlike confederacy of Indian tribes, formerly
   inhabiting Central New York and constituting most of the Five
   Nations. Also, any Indian of the Iroquois tribes.

Source : WordNet®

Iroquois
     n 1: any member of the warlike North American Indian peoples
          formerly living in New York state; the Iroquois League
          were allies of the British during the American
          Revolution
     2: a family of North American Indian languages spoken by the
        Iroquois peoples [syn: {Iroquoian}, {Iroquoian language}]