"They can't use the celeb's really name so they use parody's to give hints. In this case it would be taboo to call a Liv Tyler look-a-like "Liv", so it's extended to "Livia"."
Syltermermaid's Livia is most definitely Liv Tyler. She leaves an unusually blatant hint for this kind of thing - "A character from Middle Earth". I started this thread over the very brunette, brown-eyed 3DCelebrity Livia at DAZ3D. I didn't know there was another.
(Sylter? Was this user name created on a day when the reading glasses could not be found?)
Because of the artists being unable to tell you who the darn thing is, 3D Celebrities for Poser have become 3D Rorshack Blots where everyone sees what they want to see. It's like a psychological social phenomenon.