'aureola' originates from Latin, specifically the word 'aureola,' a diminutive of 'aureus,' where 'aureus' meant 'golden'.

'aureola' changed from Latin (classical and late Latin use) into Old French 'aureole' and Middle English 'aureole', and eventually entered modern English as 'aureole' (with 'aureola' and the Latin plural 'aureolae' also used).

Initially it meant 'little golden (thing)' as a diminutive of 'golden', but over time it evolved into its current meaning of 'a halo or ring of light' surrounding a head or object.