Answer: tweedledee

AnswerCrossword Clue
TWEEDLEDEE"Through the Looking-Glass" brother
TWEEDLEDEEOne of an inseparable pair.
TWEEDLEDEEVocalist of "The Walrus and the Carpenter."
TWEEDLEDEE"Contrariwise" character.
TWEEDLEDEEFictional fat boy.
TWEEDLEDEEDueling Carroll character.
TWEEDLEDEEWell-known look-alike
TWEEDLEDEEOne of an identical pair
TWEEDLEDEE"Through the Looking-Glass" character
tweedledee(Scots) to tweedle on a fiddle