There were multiple Mousepaws. You have Mousetail and Mousewhisker. Mousetail is an elderly cat and Mousewhisker is one of Daisy's kits.
Mousepaw's warrior name could be Mousewhisker or Mousefur, following the typical naming conventions in the Warriors series.
Flametail
James Warrior's birth name is Will Warrior.
Sparrowpelt was Halftailβs warrior name before his tail was bitten by a badger(I think)
Dovepaw's warrior name is Dovewing. Ivypaw's warrior name is Ivypool.
Rusty, or Firepaw's, warrior name is Fireheart.
Bluestar's warrior name was Bluefur.
Honeypaw's warrior name is Honeyfern.
Bumblekit's warrior name is Bumblestripe.
Firekit's warrior name was Fireheart.
The elvish name for warrior is "heru".
Featherpaw's warrior name is Feathertail and Stormpaw's warrior name is Stormfur
Leopardstar's warrior name was Leopardfur.
a she-cat or she-warrior.