TomeNET

(3.1c) Character names, collisions and reservations                             
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You cannot pick names of characters that are already in use by other players or
that are very similar to another player's account name.
However, if your character dies and gets erased, its name will be reserved for
you for 24 hours, allowing you to recreate it if you want to.
Certain swear words are also not allowed in character or account names.
Last but not least you cannot create an account with a name of an existing
character or account of someone else, but your actual account name will at the
same time always be reserved as a character name for you personally, so there
is no need to hurry and create a character of the same name as your account
just to reserve it for you.