Names in the Warriors series are easy to come up with if you know which prefixes and suffixes to use.

A good Clan cat name follows these guidelines:

-has one prefix and one suffix
-doesn't include the most ridiculous names that are listed under "Names You Shouldn't Use" (optional because you don't have to follow all of my tips if you don't want to)
-easy to read in the story
-makes sense

A good Clan cat name would be any of the following:

(I know I'm using canon names; they are used as an EXAMPLE)

Colors: Redfur, Bluepelt, Whitepelt, Blacktail, Yellowclaw, Goldenstripe, Graypool

Plants: Lilynose, Mossheart, Rosebriar, Leafstorm, Vinetail, Daisyheart, Blossomleaf, Petalnose, Hollyleaf, Fernbelly

Rock: Stoneclaw, Pebbleheart

Water: Mistyleaf, Dewnose, Ripplejaw, Rainpelt, Poolcloud

Fire or heat: Sunstorm, Firetail, Emberclaw, Ashfoot

Air and weather: Breezewhisker, Blizzardwing, Rainbelly, Snowleap, Cloudheart

Trees: Birchheart, Cedarclaw, Beechpaw, Oakpelt, Willowclaw, Mapleshade

Animals: Crowscar, Frogheart, Mousetail, Wolfclaw, Owlclaw, Deerleap, Doespring, Hareleap, Ottertail, Goosefeather, Robinwing, Ravenpelt, Ratclaw, Leopardclaw, Liontail, Tigerstorm, Snaketail

Light: Brighteyes, Darkclaw

Ground: Sandstorm, Dustpelt, Mudfur, Grasstail, Stoneleap

Time: Duskflower, Dawnpelt, Morningflower

Other: Clawface, Crookedjaw, Brokentail, One-eye, Halftail, White-eye, Onewhisker

You can see these are excellent names for a Warriors fanfiction. But there are some you shouldn't use. These use prefixes and suffixes that don't sound right when used in a Warriors fanfiction.

Names You Shouldn't Use: (rewritten)

Minerals: Diamondwing, Emeraldeyes

Animals: Dogkiller, Catscratch, Horsefoot, Twolegheart

Other: Winterfur, Summermist, Autumnfall

Plain Ridiculous: Mosssmoss, Moonmoon, Fernfern, Stormstorm, Cloudcloud, Featherfeather, Gorsegorse, Clawclaw, Poolpool, Leafleaf, Starstar, Firefire, Birdbird, Hawkhawk, Flowerflower, Meowmeow, Purrpurr, Hisshiss, Catcat, Catstar, Thebestleadereverstar, Thenextthingtothebestnamestar, Theseareridiculouspaw, and many others

Names That Are Okay to Use Even Though They Aren't Technically Canon:

Animals: Bearclaw, Skunkstripe

Other: Springleap