The Collaborative International Dictionary of English v.0.48:

Easterling \East"er*ling\, n. [Cf. Sterling.]
   1. A native of a country eastward of another; -- used, by the
      English, of traders or others from the coasts of the
      Baltic.
      [1913 Webster]

            Merchants of Norway, Denmark, . . . called . . .
            Easterlings because they lie east in respect of us.
                                                  --Holinshed.
      [1913 Webster]

   2. A piece of money coined in the east by Richard II. of
      England. --Crabb.
      [1913 Webster]

   3. (Zo["o]l.) The smew.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Easterling \East"er*ling\, a.
   Relating to the money of the Easterlings, or Baltic traders.
   See Sterling.
   [1913 Webster]