As you say, she's not lacking content but she is lacking a two-part name. The name Petra I think occurs in three mags., to date?
Single names:
Club (US), 1995-11 as Petra - by Jack Harrison
Velvet, 1995-11 as Nicole
Mayfair 31-04, 1996 as Petra, Pamela Petrokova as Patricia - by Viv Thomas
Club Confidential, 1996-12 as Petra - by Viv Thomas
Unnamed?:
Club (US), 1995-08 - Blind man's bluff - by Jack Harrison
Velvet, 1995-12 - Pulse fiction
Szex Bazar, 1997-02
Hustler Couples - with Pamela Petrokova
New Direction
There's another model whose names include
Petra (aka...). In a way she's an example of what's wrong with simply adding every additional name to a model's title. I suspect at least some if not all of the "Anna" names there relate instead to a different model (i.e. in 2+ model sets) who goes by
Anna aka Marina..., etc. and who like Petra above also hasn't yet found a thread because of difficulties over deciding a name.
All fun and games?