'adstipulator' originates from Latin, specifically the word 'adstipulator,' where 'ad-' meant 'toward' and 'stipulator' referred to a person who makes a formal promise.

'adstipulator' changed from the Latin word 'adstipulator' and has remained largely unchanged in modern English usage.

Initially, it meant 'a person who makes a formal promise,' but over time it evolved into its current meaning of 'a secondary surety or co-signer.'