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Webster 1913 Edition

(kwĭz′zẽr)

Noun.

One who quizzes; a quiz.

quizzer ‎(plural quizzers)

A person who quizzes or asks questions.
A person who takes part in a quiz.
(dated) One who chaffs or mocks.
- (Can we date this quote?) Margracia Loudon, First Love
  Meanwhile, the whirl of gaiety, the noise of merriment, was still going on around them. Frances was the ringleader of the quizzers of Lady Susan, and her ladyship evidently liked being quizzed, so that Frances did not think mercy necessary.

quizzer c

quizzer