'banqueter' originates from English, specifically formed from the word 'banquet' plus the agentive suffix '-er', where 'banquet' ultimately derives from Old French 'banquet' (a diminutive of 'banque').

'banquet' was borrowed into Middle/Modern English from Middle French/Old French 'banquet' (a diminutive of 'banque' meaning 'bench'); the English agent noun 'banqueter' was later created by adding English '-er' to 'banquet'.

Initially, the root (Old French 'banque') referred to a 'bench' (a seat or table-like bench); over time this came to mean a 'feast' or 'banquet', and 'banqueter' came to mean 'one who attends or gives a banquet'.