Clan Creation Guidelines

First and foremost, in order to create a clan of your own you are required to receive administrative permission. Secondly, you'll have to put your clan's population in between 25-100 so that the Staff can get a general idea of your clan's prominence in its respective region. If it's a powerful, reputable and very old clan such as the Hyūga, it will be at maximum capacity. If it's a war-ravaged clan such as the Uchiha or Senju, you'll likely cut the numbers in half since those clans are constantly quarreling with one another. If it's a blood-lusting clan that tends to involve itself in every skirmish such as the Kaguya, then its numbers would be greatly reduced.

Under most circumstances, if you create a clan, the Staff will expect that you intend to be that clan's House Head. Otherwise, it may complicate the affairs of that clan, since that clan won't be properly represented in the ninja world. If you don't intend to be the House Head of whichever clan you're establishing, then do so at your clan's own peril, since it is the House Head who will be placed in charge as commander-in-chief and largely over the direction in which that clan goes within the role-play.

You're permitted to establish pre-existing clans such as the Kurama in the Naruto Ancients role-play if that's what you want to do, but if you do do that, don't just do it to add yet another clan, add it with the intent to role-play as a member of said clan. That said, your clan isn't required to have a Kekkei Genkai, as a matter of fact, some won't, since the vast majority of ninja in the naruto world don't posses a kekkei genkai themselves -- realize that when you create a ninja in Naruto Ancients he/she needs to belong to a clan, unless he/she is a Rogue Ninja or Ninja Guardian.