Firestar never had kits with Sandstorm, therefore the Three were never completed.
Lostface stopped caring for others, including future mate Cloudtail, therefore Whitewing was never born. Dovewing and Ivypool were never born either.
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BloodClan:
Leader:
Poison
Deputy:
Ice
Guards:
Lostface
Blackfoot
Jaggedtooth
Crowfeather
Brambleclaw
Tabby
Medicine Cats:
Barkface
Cinderpelt
Littlecloud
Mudfur
Apprentices:
Deathpaw (Tawnypelt's son)
Icepaw (Tawnypelt's daughter)
Bloodpaw (Oakfur's son)
Hawkpaw (Hawkfrost)
Mothpaw (Mothwing)
Coldpaw (Onewhiskers son)
Haypaw (Onewhiskers son)
Heatherpaw (Onewhiskers daughter)
Dagger (Minty's son)
Silence (Minty's son)
Warriors:
Ashfoot
Ashfur
Blackclaw
Boulder
Brackenfur
Brick
Burn
Cedarheart
Claw
Cloudtail
Deadly
Dustpelt
Fang
Feathertail
Flame
Frostfur
Graystripe
Hoot
Jumper
Longtail
Loudbelly
Minty
Mistyfoot
Mousefur
Mudclaw
Oakfur
Ocean
Onewhisker
Pounce
Rainwhisker
Rowansting
Sandstorm
Shadepelt
Snake
Snapper
Snipe
Sootfur
Sorreltail
Tess
Tornear
Timber
Webfoot
Willie
Queens:
Tawnypelt: Flamekit, Tigerkit and Dawnkit.
Russetfur: Leopardkit, Lionkit, Bumblekit and Horizonkit.
Dawnstripe: Piercekit.
Ferncloud: Breezekit.
Violet: Larkkit, Gingerkit and Eaglekit.