Precedent from 2004 held that the first documented instance of Mercedes as a given name was from 1690. Now, thanks to the Family Search Historical Records, we have found instances of the given name within the gray period in Spain and in Spanish-speaking New World colonies.
Mercedes [no surname]; Female; Christening; 23 Apr 1626; San Lorenzo, Valladolid, Valladolid, Spain; Batch: C87108-4
Mercedes De Laora; Marriage; 03 Oct 1632; Santa Ana, Ocaña, Norte De Santander, Colombia; Batch: M65635-4
Mercedes Tobar; Marriage; 10 Aug 1637; Santiago, Santiago, Chile; Batch: M00926-2