The name Friday is a boy's name . Friday and is often added to lists like Badass Cat Names .
From the experts:
Friday became famous as a name via the sidekick character in Daniel Defoe's Robinson Crusoe, morphing into a generic term for an all-around professional assistant, as in "girl Friday." As a word for the day of the week, Friday is associated with the old English goddess Frigg and the Roman goddess Venus, though the character makes Friday more of a male name.