'baldrick' originates from Old French, specifically the word 'baudrier', which in turn comes from a West Germanic (Frankish) source where elements referred to a belt or strap.

'baldrick' changed from Old French 'baudrier' into Middle English forms such as 'baldrek'/'baldric' and eventually became the modern English 'baldrick'.

Initially it meant a belt or strap for carrying weapons, and this basic meaning has been retained into modern usage.