4. big mouth - the ml's nickname (big mouth/mouse) makes him mistaken as an infamous criminal
5. death note - the two main characters' names kind of revolved around the same meanings/ symbolisms, demonstrating that they were two sides of the same coin sorta— Light Yagami and L. Lewliet also to use the death note, you have to know the victim's name...
idk if these count since one is a nickname, and the other has it's whole plot revolving around names
bonus; Alice in borderlands, idk if it's for sure but I always interpreted the ml/mc's name as a reference to the rabbit hole alice travels through in alice in wonderland