Yes this is official, I can't find any indication that it's a spoiler. I can't find any reference that it's actually used but it's a reasonable inference so I have no problem with it.
Posted under General
To prove I'm not pulling stuff out of my butt, here's a video of her Soulcalibur III profile. Full name shows up at 0:29.
http://www.youtube.com/watch?v=I80WR1Sg7dw