The Armor Wars Spider-Woman is the first Spider-Woman, Jessica Drew who doesn't have any real relation to the others. She's the same person as both the Chaos War Spider-Women and the AW LE Jessica Drew. There's also the SI chase Spider-Woman who's actually a Skrull pretending to be her.

Jessica has a REALLY long, and VERY complicated history herself but I think Wikipedia does a decent job of summing it up here

http://en.wikipedia.org/wiki/Jessica_Drew

And neither of the two Spider-Girls (May and Anya) have ever gone by the name Spider-Woman, but just to add to the confusion, a THIRD girl *has* gone by that name (making her the third Spider-Woman in chronological order), namely Mattie Franklin (who is also unclixed so far)