'fellow' originates from Old English, specifically the word 'feolaga,' where 'fe-' meant 'money' and '-laga' meant 'one who lays down or shares.'

'feolaga' transformed into the Middle English word 'felaw,' and eventually became the modern English word 'fellow'.

Initially, it meant 'partner in business or trade,' but over time it evolved into its current meaning of 'companion or associate.'