Anglicized form of Carolus (see Charles), or of its feminine derivative Carola. It has never been common as a boy's name, and has become even less so since its growth in popularity as a girl's name. This seems to be of relatively recent origin (not being found much before the end of the 19th century). It probably originated as a short form of Caroline.
English: from the Old French verb fourbir ‘to burnish’, ‘to furbish’ (a word of Germanic origin), an occupational name for a polisher of metal, in particular someone employed by an armorer to put the finishing touches to his work.