I'm sorry, I just had to do all these. forgive me for the long post.
Cloudsplash - 9/10, a very good name and it fits the cat it belongs to.
Fishtail - 2/10, I have a few problems with this one. fish- could mean any kind of fish, so it doesn't really represent the cat's appearance very well -- it's really vague. -tail, however, is supposed to represent a cat that is good at climbing or very agile, since a cat's tail helps with balance. if this cat was in a clan, he probably would be afraid of climbing because of his short tail which doesn't provide much balance, which would definitely not warrant a -tail suffix.
Darkwing - 5/10, dark- is a good prefix, but -wing isn't a suffix I would recommend, especially not for this cat. if he's a good fighter and not hunter, use -claw.
Spottedlegs - 4/10, spotted- is a pretty good prefix for this cat but I'm not sure what -legs might represent. if she's quick on her feet, try -foot. if she's good at climbing, try -tail.
Marshmist - 5/10, marsh- is an okay prefix but definitely not for this cat. perhaps a grey-brown, dark grey or dark brown tabby would be better for this name. -mist I like, it conveys a secretive and mysterious air, but for this cat, I think -claw would be a better fitting suffix, as it shows very good battling skills.
Crowclaw - 10/10, a perfectly fitting name. it sounds good too.
Snowstorm - 8/10, a good name but for this cat I would recommend the suffix -whisker, as it is given to cats who are good hunters. -storm would be fitting a more volatile cat.
Cloudfur - 9/10, I like this name as well as this cat. if his prefix wasn't cloud- I'd recommend the suffix -cloud, but -fur is perfect for this situation.
Sparrowfang - 8/10 as long as this cat is above average at both hunting and fighting, as that's what -fang represents. if not, I'd say -storm works better.
Oatmeal - 100/10, this is the best name in all of the clans and it fits the cat so well -- especially since the cat is also a breakfast food, apparently. (please do not take this seriously)
Deerstep - a fast brown she-cat with long legs, very graceful and able to run well through thick woodland
Foxclaw - lean ginger tom, a very strong fighter with creative battle techniques
Frostface - small white she-cat with a bite to her speech, usually surprises cats with the intelligence and wit behind her pretty face