nominator

Concise Oxford English Dictionary © 2008 Oxford University Press:
nominate/ˈnɒmɪneɪt/

▶verb

• 1 put forward as a candidate for election or for an honour or award.

  ■ appoint to a job or position.

• 2 specify formally.

▶adjective Zoology & Botany denoting a race or subspecies having the same epithet as the species to which it belongs, e.g. Homo sapiens sapiens.

– derivatives
nomination noun,
nominator noun.

– origin ME (as an adj. in the sense ‘named’): from L. nominat-, nominare ‘to name’, from nomen, nomin- ‘a name’.