'jointly-owned' originates from the combination of 'jointly' and 'owned', where 'jointly' comes from the Latin 'junctus', meaning 'joined', and 'owned' is derived from Old English 'āgen', meaning 'to possess'.

'jointly-owned' evolved from the Middle English 'jointly' and 'owned', which were used separately before being combined into a single term in modern English.

Initially, it meant 'owned together', and this meaning has remained consistent in modern usage.