'bander' originates from English, formed by the verb 'band' + the agentive suffix '-er', where 'band' meant 'to bind or tie'.

'band' comes from Old Norse 'band' (and related Old English forms from Proto-Germanic *bandą meaning 'a bond, tie'); the agent noun 'bander' was created in Modern English by adding '-er' to the verb 'band'.

Initially it meant 'one who binds or ties'; over time it has come to be used more specifically for 'one who places bands or rings (often for marking or identification)'.