'Aries' originates from Latin, specifically the word 'aries', where 'aries' meant 'ram'.

'Aries' passed into English from Latin (and Medieval Latin) retaining the form 'aries'; it was adopted into Middle English as 'Aries' referring to the constellation and later the astrological sign.

Initially it meant 'ram' in Latin and referred to the animal and the related constellation; over time it became the proper name for the zodiac sign and for people born under that sign.