World of Warcraft's banned name list seems pretty arbitrary

You are not allowed to have NPC names like **Terenas**, **Antonidas** or **Uther**, but **Jaina**'s completely allowed.

You are not allowed any feudal titles if they're natively English (**Queen-, King-, Duke-, Squire-, Knight-) but non-natively English ones like **Marquis, Viscount, Margrave, Sultan** etc. are permitted.

You are not allowed to have some names that are professions or classes like **Summoner** or **Necromancer**, but it's completely okay to be named **Deathknight** or **Monk**

You are not allowed to have product names, company names or other trademarked names like **Snapple**, **Google**, or **pearljam**, but you *are* allowed to have names like **Mountaindew**, **Costco** and **Aerosmith**

It just seems weird and inconsistent what names are and aren't banned