GraemeDavis , 
This is all Icelandic draugar. They are my favorite undead because they are simply too mean or too stubborn to stay down. They also have a really interesting array of abilities that GMs will love.
One of the early releases in my upcoming #systemagnostic #ttrpg #secretproject will tell you all about them. In the meantime, if you play Vaesen, there's this:
https://legacy.drivethrurpg.com/product/390197/The-Draug-A-Creature-for-Vaesen
