Dionymal name
Dionymal names are those that have two uses, most commonly occurring when first names can be last names and vice-versa.
Example:
Kelly: "Hey, my name's Kelly George. What's yours?"
Tim: "Eh, Im Tim. Wow, you've got a dionymal name!"
Kelly: "Uh, what does that mean Tim?"
Tim: "Well, it means your first name can be a last name, and your last name can be a first name. Dionymal"
Kelly: "Wow Tim, you're a loser"
Tim: "Whatever slut, get a dictionary"
Kelly: "Hey, my name's Kelly George. What's yours?"
Tim: "Eh, Im Tim. Wow, you've got a dionymal name!"
Kelly: "Uh, what does that mean Tim?"
Tim: "Well, it means your first name can be a last name, and your last name can be a first name. Dionymal"
Kelly: "Wow Tim, you're a loser"
Tim: "Whatever slut, get a dictionary"