Name unaccesible

I checked lodestone for the availability of the name "Arturia Pendragon" and saw that the name was not taken on Tonberry server

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http://na.finalfantasyxiv.com/lodestone/character/?q=pendragon&worldname=Tonberry&classjob=&race_tribe=&order=

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so i bought a character renaming service and tried changing my name into that but it said that the name was unavailable.

It very well could be that the account with that name (on that world) could have been banned and thus taking the name with it.

Since other worlds have that name, I don't think it's restricted from use...