Sartosans are a minor bloodline from the corsair city of Sartosa. They were founded by Luthar Harkon, a distant relative of the Von Carsteins whose body was found by pirates. They were vampirised after accidentally spilling blood on his remains, and the Sartosans patrol the seas still.
The Sartosans are represented by a collector's edition Citadel miniature created by Games Workshop for their black comedy/fantasy game Warhammer. The product listing is here.