@CollinPotato I know this is very old but I thought it might be fun, I personally think my name is unique but wouldn't really consider it rare so leave that out. We have someone on our server who goes by the name MadeInMurica @MadeInMuricaCo. This name is surprisingly not an old one either, it was made about a year and a half ago. Another could possibly be prescar, DragonDaMan, I think there's one of the name Tesfa, well there was it is now iBeTesfa I also remember we have Spottedclock, you just remember him, he played a lot way back when Meow and Sun were still in their whiny fights.
Regarding "Stager" this account can no longer be /seen because it was name changed after someone actually hacked the account. Me and the owner were very close and shared accounts, I actually logged onto another server and got offered 150$ for the name because someone said that this was the name they had tried to get.
i was changing my name, and i couldn't decide what to put it as so i put 'gummyworm', turns out it's available, however i don't know if it's rare or not