Mercade (murr-KAYD) is quite the interesting boy's name. It was used by Shakespeare in "Love's Labour's Lost." The character Mercade is a lord who attends the princess of France, and he has a total of four lines (I believe), but Shakespeare chose his character's names well, so Mercade is not just any afterthought. There is a book called Shakespeare's Comic Commonwealths that tells us his name is no coincidence: "Several critics have noted connections between Mercade and Mercury," the author says, "as the messenger of the gods and the god of oratory, but they have not commented on Mercury as the divine messenger recalling people to their social responsibilities." The similarities between the character Mercade's messenger duties, the importance of his message, and the affect of his message, even being only four lines total, is not a coincidence - Shakespeare most definitely intended him to be a Mercury-like character.
From Latin mercatus, meaning "trade," then Latin mercado, meaning "marketplace," and finally mercader, meaning "merchant," it could have been an ancient occupational name, as I said, used in Shakespeare, that unfortunately never got picked up. It is so rare, and no babies were given this name in 2011 or in recent years.