Means: As soon as a Game Master gets to know that someone used a char name, which is not really a name for a person or the name of a prominent person or figure, (s)he will contact you and ask you to suggest another valid and unique name, or will give you a randomised name if you refuse to cooperate...
In "ancient times", the Naming Policy might not have been enforced. Now it is. Get used to it (it happened to me as well)...
You could probably use a name which sounds very similar, but not exactly the same (e.g. "Suriveor" or alike).