From French quart d’écu.

cardecue (plural cardecues)

1. (historical) An old French coin worth one quarter of an écu.
   • c. 1604–1605 (date written), William Shakespeare, “All’s Well, that Ends Well”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene iii], page 248, column 2:

     Sir, for a Cardceue he will ſell the fee-ſimple of his ſaluation, the inheritance of it, and cut th’ intaile from all remainders, and a perpetuall ſucceſsion for it perpetually.