'aquascutum' originates from Latin, specifically the words 'aqua' and 'scutum', where 'aqua' meant 'water' and 'scutum' meant 'shield'.

'aquascutum' changed from the Latin phrase 'aqua scutum' and the form was later adopted as the trade name 'Aquascutum' in 1851 by English tailor John Emary; the name then became associated with the modern brand of waterproof garments.

Initially, it meant 'water shield' referring to a waterproof covering; over time it evolved into a proper name for a clothing manufacturer and, by extension, a label for certain coats.