'handler' originates from the Old English word 'handlian,' where 'hand' meant 'hand' and '-lian' was a suffix used to form verbs.

'handlian' transformed into the Middle English word 'handlen,' and eventually became the modern English word 'handle,' from which 'handler' is derived.

Initially, it meant 'to touch or feel with the hands,' but over time it evolved into its current meaning of 'a person who manages or controls something.'