noun (n)

• someone who devotes himself completely(noun.person)

  Example:
  There are no greater givers than those who give themselves.
  

  source: wordnet30
• person who makes a gift of property(noun.person)

  Synonym:
  bestower, conferrer, donor, presenter
  

  source: wordnet30
• One who gives; a donor; a bestower; a grantor; one who imparts or distributes.(noun)

  source: webster1913