Nomen nescio

"Nomen nescio" is a Latin phrase that means "name unknown". It's like when your mommy and daddy give you a present that doesn't have a name tag on it, so you don't know who it's from. In the same way, "nomen nescio" is used when we don't know the name of someone or something. It's a cool way of saying, "I don't know their name."