'allegatum' originates from Latin, specifically the word 'allegare,' where 'ad-' meant 'to' and 'legare' meant 'to send or dispatch.'

'allegare' transformed into the Medieval Latin word 'allegatum,' and eventually became the modern English word 'allegatum.'

Initially, it meant 'to send or dispatch a statement,' but over time it evolved into its current meaning of 'a statement or assertion made in a legal context.'