The four Princes of the Tarot.

Prince of Wands | Cups | Swords | Disks

Classical decks call these cards Knights. Qabalistically, they are the Vau in יהוה, corresponding to Yetzirah or to the Sephirah Tiphareth.

Read more about the court cards.

The following text is from Crowley's Book of Thoth.

The Princes represent the Forces of the letter Vau in the Name.[1] The Prince is the Son of the Queen (the old King's daughter) by the Knight who has won her; he is therefore represented as in a chariot, going forth to carry out the combined Energy of his parents. He is the active issue of their union, and its manifestation. He is the intellectual image of their union. His action is consequently more enduring than that of his forbears. In one respect, indeed, he acquires a relative permanence, because he is the published record of what has been done in secret. Also, he is the "Dying God", redeeming his Bride in the hour, and by the virtue, of his murder.