Alias.
“You have as many aliases as Robin of Bagshot,” one of Macheath’s gang: he was Robin of Bagshot, alias Gordon, alias Bluff Bob, alias Carbuncle, alias Bob Booty.—Gay: The Beggar’s Opera.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.