They were forced to change the child's name by California law, so technically it is not a name. X Æ A-Xii is on the site and X Æ A-12 is listed as a variant. Generally variants are allowed on the site, but since there are no actual bearers of that variant (as far as I know) and it was just a discussion, it would not be considered real.
XÆ A-Xii:
https://www.behindthename.com/name/x00ae3200a01xii/submitted
Computer was deleted because you provided no sources and we, the editors, could not find any.
You can put anything on the site that you can prove is or was at some point someone's name.