Hollykit

Hollykit is a name shared by four different kittehs.
DID YOU MEAN...
Hollykit, daughter of Whorecloud and Dustpelt, who dies in the The new Prophecies Arc?
OR...
Hollykit, daughter of Leafpool and Crowfeather, who later becomes Hollyleaf?
OR...
Hollykit, daughter of Lionblaze and Cinderheart, who later becomes Hollytuft?
OR...
Hollykit, forbidden daughter of Foxleap and someone from the Tribe of Rushing Water, who is obsessed with whiskey and later becomes Hollywhisker?
Only one of these Hollykits is not real. Which one is it?