Brief 2 - Cards: Who Are the Picture Cards?

Playing Card	Historical Personage
King of Hearts	Charlemagne
Queen of Hearts	Judith (of the Book of Judith, an Apocryphal Book of the Bible)
Jack of Hearts	"La Hire," a famous French warrior a.k.a. Etienne de Vignoles
King of Spades	King David
Queen of Spades	Pallas, a.k.a. Minerva
Jack of Spades	Hogier the Dane, one of Charlemagne's paladins
King of Diamonds	Julius Caesar
Queen of Diamonds	Rachel (of the Bible)
Jack of Diamonds	Hector of Troy alternately, Roland of France
King of Clubs	Alexander the Great
Queen of Clubs	Argine An anagram of Regina
Jack of Clubs	Lancelot

It is interesting to know the amount of history behind the cards and who they are supposed to represent. I've also found interesting nick names for the people on the cards by the way they are positioned and drawn. 

The Jack of Spades, Jack of Hearts, and King of Diamonds are drawn in profile, while the rest of the court are shown in full face; these cards are commonly called "one-eyed"

The King of Hearts is the only King with no mustache, and is also typically shown with a sword behind his head, making him appear to be stabbing himself. This leads to the nickname "suicide king"

The axe held by the King of Diamonds is behind his head with the blade facing toward him. He is traditionally armed with an axe while the other three kings are armed with swords, and thus the King of Diamonds is sometimes referred to as "the man with the axe"

The Jack of Diamonds is sometimes known as "laughing boy"

The Queen of Spades usually holds a scepter and is sometimes known as "the bedpost Queen", though more often she is called "Black Lady"

In many decks, the Queen of Clubs holds a flower. She is thus known as the "flower Queen"