I believe that an item features a name if it's crafted -- a signature of sorts. Thus items without any name were bought from a shop, dropped from a monster, or received as a reward for a quest.
Thanks for the replies^^ One more question though. I'm not sure why I am seeing items like hq militia gear/tools with no names on them when the only way I know how to get those is by crafting, are those items in high level chests?