Source : Webster's Revised Unabridged Dictionary (1913)

Leon \Le"on\ (l[=e]"[o^]n), n.
   A lion. [Obs.] --Chaucer.

Source : WordNet®

Leon
     n 1: a historical area and former kingdom in northwestern Spain
     2: a city in northwestern Spain at the foot of the Cantabrian
        Mountains
     3: a city in central Mexico