Each face card in a deck of playing cards is said to represent a great person from history:

King of Spades – David

King of Hearts – Charles (possibly Charlemagne, or Charles VII, where Rachel would then be the pseudonym of his mistress, Agnès Sorel)

King of Diamonds – Julius Caesar

King of Clubs – Alexander the Great

Queen of Spades – Pallas

Queen of Hearts – Judith

Queen of Diamonds – Rachel (either biblical, historical (see Charles above), or ythical as a corruption of the Celtic Ragnel, relating to Lancelot below)

Queen of Clubs – Argine (possibly an anagram of regina, which is Latin for queen, or perhaps Argea, wife of Polybus and mother of Argus)

Knave (Jack) of Spades – Ogier the Dane/Holger Danske (a knight of Charlemagne)

Knave (Jack) of Hearts – La Hire (comrade-in-arms to Joan of Arc, and member of Charles VII’s court)

Knave (Jack) of Diamonds – Hector

Knave (Jack) of Clubs – Judas Maccabeus, or Lancelot