I found it. Names of items, in addition to basically every bit of text in the game, is housed in the stats.lbs (Public\Main\Localization).
To give an item an in game name you have to open the TranslatedStringKey menu, create a new table and put the items reference name in the key column (like WPN_Void_staff_01) and then the items in game name in the content column.
Last edited by Wretched Enigma; 30/08/14 09:58 AM.