'bobby' originates from English, specifically the nickname 'Bobby,' which was derived from 'Robert Peel,' the founder of the Metropolitan Police Service.

'Bobby' was used as a nickname for police officers in the 19th century, derived from 'Robert Peel,' and eventually became a common term for police officers in the UK.

Initially, it referred specifically to officers of the Metropolitan Police, but over time it evolved into a general term for police officers in the UK.