'bander' originates from English, formed from the noun 'band' plus the agentive suffix '-er' (meaning 'one who'). The noun 'band' itself comes from older Germanic sources meaning 'a binding or bond'.

'band' derives from Old Norse/Old English Germanic words (e.g. Old Norse 'band' meaning 'a bond' or 'that which binds'), which became the Modern English 'band'; the agentive formation produced 'bander' to denote one or something that applies a band.

Initially, the root 'band' meant 'something that binds'; with the agentive suffix '-er', 'bander' originally meant 'one who binds'. Over time the sense specialized to someone or something that applies bands or straps (e.g., to animals or packages).