A Kindred’s clan is his lineage, the vampiric "family" into which he was Embraced. The clans are distinguished by their Antediluvian founders. Kindred society generally acknowledges 13 clans tonight, though some may have been lost to history, some may exist in secrecy, and some may never have been known.
Like all bloodlines, each clan has greater familiarity with a set of three Disciplines, a clan weakness largely unique to its members, and various stereotypes attributed to it as a result of a tendency to Embrace individuals with certain characteristics. The clans are generally differentiated and set above bloodlines by their greater number and influence throughout the world, identification with an Antediluvian progenitor, a history that reputedly extends back to the Second City, and clan weaknesses that were said to be handed down by Caine himself.
Very few non-vampires recognize the differences that set apart members of each clan and may in fact consider all vampires to be roughly the same as they all share a common ancestor (Caine). The majority of Cainites take the divisions and lineage in general quite seriously, particularly the elders and those who know their complete lineage. During the Dark Ages, the High Clans and Low Clans marked the upper and bottom rungs of vampiric society, with one's ancestry greatly influencing the possibility for advancement and respect. Centuries later, these class divisions would be abandoned for the division of sects between the Camarilla, Sabbat, and independent clans.
Each clan has its own organization and culture that is considered important by its members, and though individuals are rarely willing to make any self-sacrifice for their clanmates, a general sense of understanding often elicits some preference for those of similar blood. Likewise, since vampires of any particular clan are often grouped together for political means, such as representation among the primogen of a city, they may work together and present a unified front out of necessity. Such appearances almost always mask internal conflicts, however, and it is considered incredibly naive to treat all individuals of a clan the same.
Banu Haqim
Brujah
Caitiff/Thinbloods
Gangrel
Hecata
Lasombra
Malkavian
Setites
Nosferatu
Ravnos
Tzimisce
Ventrue