Quote Originally Posted by AoiSora
Are those real? I've never seen those anywhere before.
As far as I know, they were created by fans, but Square has made at least one of them legitimate; in Before Crisis, Tseng is referred to as Tzon. Also, Rude's last name is either Urnar or Ulnar depending on the source, indicating that the names originated in Japan.

Aeris's last name is Gainsborough.