In an online chat Erin Hunter revealed that Ivypaw's warrior name will be Ivypool, after a little girl named Ivy Poole who Victoria Holmes met.
Dovewing and Ivypool
James Warrior's birth name is Will Warrior.
Sparrowpelt was Halftail’s warrior name before his tail was bitten by a badger(I think)
Bluestar's Warrior name was Bluefur.
Dovepaw's warrior name is Dovewing. Ivypaw's warrior name is Ivypool.
Rusty, or Firepaw's, warrior name is Fireheart.
Honeypaw's warrior name is Honeyfern.
Firekit's warrior name was Fireheart.
Bumblekit's warrior name is Bumblestripe.
The elvish name for warrior is "heru".
Featherpaw's warrior name is Feathertail and Stormpaw's warrior name is Stormfur
Dovepaw and Ivypaws mother is whitewing and the father is Birchfall. Hope you find this answer helpful!!!