Char name Chaos not allowed?

[Crimson1345]

The name is not any server if you look at the lodestone it shows Chaos' or Chaosa or something along those lines. I used to have my old account in 1.0 char had the name but since losing info since I was serverving over seas well I started another account. No luck I even called support they have no answer to it first time they heard of it. The phone support told me to post on the forums feed back so thats why I'm asking. Did something happen for the system to prevent that name from being used? I could even name my chocobo chaos like my alt has. I was just curious as to why not characters? In FF1 there are no defualt names for the charcters it was started at FF2 and onwards.