Forum:When to add Template:Unnamed

I've recently been going through Section 12 of Special:Allpages for Revise 3, and have had to put Template:Unnamed on a few of the articles. Now, as I was editing them, I wasn't sure which pages needed the Unnamed template. Is it just characters, or all made up (by wikians) names, or what? Do we need some specific rules for this? 03:04, January 9, 2013 (UTC)