Strigoi is an old Romanian word derived from Latin referring to a supernatural creature, usually a vampire. In tabletop gaming context it refers the Strigoi Bloodline of Vampire Counts from Warhammer Fantasy.
If the Von Carsteins are the Warhammer version of Bela Legosi, the Strigois are the Nosferatus, at least after the count hit the gym. They're hulking, bald (baring the occasional quill), taloned jagged fanged feral predators. Despite this they still retain considerable intelligence.