Answer: tweedledum

AnswerCrossword Clue
TWEEDLEDUM

Owner of a nice new rattle.

TWEEDLEDUM

C. L. Dodgson character.

TWEEDLEDUM

One of an identical pair.

TWEEDLEDUM
One of a well-known pair.
TWEEDLEDUM
Alice's entertainer
TWEEDLEDUMIndistinguishable one
TWEEDLEDUMLooking-glass land denizen
TWEEDLEDUM"Through the Looking-Glass" character