The Brotherhood of Thorns
In between StreamClan and ThornClan, there was a small roleplay played by Aquafrost and his family. It was called The Brotherhood of Thorns and consisted of Scottish Wildcats. The Brotherhood took place before the first AuroraClan, and existed beyond the clans.
~~~~~~~~~~~~~~ Known Individuals ~~~~~~~~~~~~~~
Aitashi, a big scarred wild-tom with a furry golden brown pelt and darker stripes (played by unknown), who lead the Brotherhood.
Rubaen, a small jet-black wild-tom with amber-red eyes (played by unknown), who lead the Brotherhood after Aitashi.
Tasra and Desmond, two individuals who were kits when Rubaen was old enough to tell stories (both played by unknown).
Luka, a big white wild-tom with blue eyes (played by tiger210004; this character was not blind), who would eventually change his name to Aqua and father Oakflower of AuroraClan 1 alongside Hollyfoot, a she-cat of a ShadowClan. He was Aquafrost's grandfather.
Eryn/Starkstar, a brown Kellas tom with darker stripes, a lighter underbelly, blue eyes, and a golden collar stuck around his neck (played by tiger210004). Eryn would have helped lead ThornClan into battle as Starkstar alongside Aquafrost against Darkstar (had the roleplay gone to plan) before changing his name back to Eryn and returning to the Brotherhood to lead it, presumably after Rubaen.
...and others lost to time.