This has been covered in many, many threads. If you want a nation with a different name, create a new one and let the one you don't want die, or leave it alive as a puppet. Nations will never be renamed.
Ah, you already posted a topic about this in "Technical". I see.
Well, since there's already a topic about this and this topic has fewer replies, iLock.
Please see this (http://www.nationstates.net/forum/viewtopic.php?t=75175) thread.
--The Modified Democratic States of Cogitation