Source : Webster's Revised Unabridged Dictionary (1913)

Giver \Giv"er\, n.
   One who gives; a donor; a bestower; a grantor; one who
   imparts or distributes.

         It is the giver, and not the gift, that engrosses the
         heart of the Christian.                  --Kollock.

Source : WordNet®

giver
     n 1: someone who devotes himself completely; "there are no
          greater givers than those who give themselves"
     2: person who makes a gift of property [syn: {donor}, {presenter}]