'Protestant' originates from Latin, specifically the word 'protestari,' where 'pro-' meant 'forth' and 'testari' meant 'to bear witness.'

'Protestant' changed from the German word 'Protestant' and eventually became the modern English word 'Protestant'.

Initially, it meant 'one who protests,' but over time it evolved into its current meaning of 'a member of the Western Christian churches that are separate from the Roman Catholic Church.'