Detached scholars obsessed with the mysteries of death and the soul, they are now (theoretically) extinct, having been systematically eliminated through a coup de famille conducted by Augustus Giovanni. Unfortunately for the Giovanni, they may have underestimated what it takes to kill a clan of experts on death. Recently, they are regarded as a bloodline of clan Hecata.
The one word that sums up the old clan is "passive". The Cappadocians had their own projects and plans, and generally focused on those while ignoring the larger affairs of the world. Blessed with an unusually active Antediluvian and a generally placid nature, the Cappadocians were much less concerned about Gehenna, political backstabbing and the other niceties of undead life. This, of course, made them natural targets for the Giovanni.