The Collaborative International Dictionary of English v.0.48:

Livonian \Li*vo"ni*an\, a.
   Of or pertaining to Livonia, a district on the Baltic Sea
   formerly part of Russia, now part of Latvia and Estonia.
   [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Livonian \Li*vo"ni*an\, n.
   A native or an inhabitant of Livonia; the language (allied to
   the Finnish) of the Livonians.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Livonian
    n 1: a member of the Livonian-speaking people of Latvia
    2: the Finnic language spoken by the people of Livonia in
       Estonia and Latvia