Once, they were warriors much like the Skaal. Trapped and hungry on this island, they feasted on the flesh of their fallen comrades, which is a crime against nature. The All-Maker cursed them with undeath, forever doomed to walk the land in search of more of the flesh of man to consume. — Korst Wind-Eye
Description: This undead type of northern barbarians haunts the resting places of the old graves on Solstheim. Their mad search for flesh makes them fierce fighters, resisting all kinds of attacks, they can only be slain by brute force.
Found: Often found in Barrows.
Note: In Norse mythology, a draugr was an undead creature believed to inhabit the tombs of dead viking warriors.

http://www.uesp.net/wiki/Bloodmoon:Draugr#Draugr

Those must be different type i guess they got a complete over haul.