Hell's Shadows- A clan which keeps a very low profile and mostly just watches all the fights. However when they get involves in something, they normally overwhelm their opponents. They work in shadows, controlling and manipulating other clans. Their leader is said to be kind and understanding at first glance, but ruthless and sadistic in reality. A trait of the clan is being able to turn into a black mist that can travel around where they want. Powers: black mist, summon hounds from hell, and transform into a swarm of bats.

Clan Roth'vor
Those born to this clan are granted the power of wind. Though not a clan with strong ties to any other clan they are a clan that remains nuetral more or less unless their hand is forced.

The Malkavians. A clan of hopelessly insane madmen who have a reputation as seers and visionaries. Also known as the Clan of the Moon or quite simply Kooks.

The Giovanni. As much a family as a clan, these insular necromancers are quick to amass wealth and power. Also known as the Clan of Death.

The Assamites. A predatory clan of assassins with a penchant for Kindred vitae. Also known as the Clan of the Hunt. P.S they only drink the blood of other vampires

The Steel Claws: In this clan everyone wheres a claw of some sort, but not only that, there skin is like Steel, Do to the fact that they have Super Durablity even compared to other vampires. This is a rather small clan formed after the great explosion, they try to remain Hidden, and neutral, but have bad habits of starting fights.

Here's a link to a site for some inspiration