Undead - B

Banshee = An ancient, Celtic spirit that serves as a harbinger of Death.
Black Death = A medieval plague of epic proportions, the Black Death is believed to have wiped out over half of Europe's population at the time. For more info see Black Death. 
Blood Gods = Vampyre gods? Oh yeah, they're real. 
Bodem = Undead pygmies. 
Braugre = A strange type of Undead native to the land of the Vikings.