'surrogate' originates from Latin, specifically the word 'surrogatus,' where 'sub-' meant 'under' and 'rogare' meant 'to ask or propose.'

'surrogatus' transformed into the Old French word 'surogat,' and eventually became the modern English word 'surrogate' through Middle English.

Initially, it meant 'to ask or propose under,' but over time it evolved into its current meaning of 'substitute or deputy.'