HIVE (Splinterlands) Account Naming Rules

HIVE is a STEEM fork (a copied software project). So HIVE account naming rules are the same as STEEM account naming rules.

Creating an account in Splinterlands, accounts get a random username like: acolyte_X, neophyte_X, recruit_X, initiate_X, apprentice_X, disciple_X and pupil_X, this username can only be changed by upgrading your account by purchasing the Summoner's Spellbook.

When you upgrade your Splinterlands account by buying the Summoner's Spellbook, you get the ability to create a custom HIVE username. This custom username must follow some rules in order to be validated in the blockchain.

Once you create a username in HIVE, it becomes permanent and cannot be changed!

You can create a valid username in HIVE following these rules:

1. Valid characters include: lowercase letters (a-z), digits (0-9), dashes (-) and periods (.).
   
   HELLO, $HeLlO_M@73 are invalid names
2. The username must be between 3 and 16 characters long.
   
   37 and helloiamthirtysevennicetomeetyou are both invalid names.
   
   
3. A valid username must start with a lowercase letter and end with a lowercase letter or digit.
   
   37k , 373, 37K and K37 are invalid names, but a37is valid
   
   
4. Each part separated by a dot should be at least 3 characters long.
   
   app.js and a.b.c.37 are invalid names, but rofl.lol is valid.
   
   
5. Dashes must have letters or numbers on both sides.
   
   a37..b37, a37--b37, a37.-b37 and a37b37- are invalid names but a37-b37 is valid.

Sources:

Github

The 5 Rules of a Valid Username on the Steem Blockchain - Steemit