Only the full two-part name has to be unique.
- A shared last name works the same way as a shared first name.
- Hide your own secondary name in the world under Game Menu, Options, Nameplates, My Secondary Name. It still appears in chat.
- The code of conduct still applies. Splitting a restricted word across both parts will not necessarily make it valid.
- Early reservation stays 27 Oct through 3 Nov 2026 for eligible upgrades.
Source Blizzard's name article, 21 Sep 2026.