The Collaborative International Dictionary of English v.0.48:

Itelmen \Itelmen\, prop. n.
   1. (Ethnol.) An aboriginal tribe inhabiting the southern part
      of the Kamchatka peninsula; called also Kamchadal and
      Kamtschadal.
      [1913 Webster +PJC]

   2. The language of the Itelmen people.
      [PJC]