We don't have synonyms for banquo yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are banque.
(n) :
A prominent character in William Shakespeare's play Macbeth, based on a semihistorical figure from the 11th century, who was previously thought to be the progenitor of the Scottish House of Stewart.
(n) :
A prominent character in William Shakespeare's play Macbeth, based on a semihistorical figure from the 11th century, who was previously thought to be the progenitor of the Scottish House of Stewart.