The Jack of Spades, Jack of Hearts, and King of Diamonds are drawn in profile, while the rest of the courts are shown in full face, these cards are commonly called "one-eyed".
The King of Hearts is shown with a sword behind his head, leading to the nickname "suicide king".
The Jack of Diamonds is sometimes known as "laughing boy".
The King of Diamonds is armed with an axe while the other three kings are armed with swords.
The Queen of Spades appears to hold a sceptre and is sometimes known as "the bedpost queen."
From Pocket Wikipedia, http://www.free-soft.ro/pocket-wikipedia/