In GLA Storyline missions: "On Holy Ground" and "The Rematch", some enemies appear without names. Not sure whether this is a bug or whether it is pseudo-intentional since they're assassins...and maybe they don't want us to know their names. :p
http://img2.finalfantasyxiv.com/acci...f1af796f93.jpg
http://img2.finalfantasyxiv.com/acci...c25ccf7d2a.jpg