A quick look at the Archives tells me there are at least two obvious ones, actually : Daemon, of course, and Div.
Others could work too, with a decent explanation :
Potentially Accursed if you decide there's an Abaddon-based Night Hag in your family tree, I guess ?
Stretch Pestilence a bit and make it a relation to the relevant Horseman or one of its servants ?
And much more, considering the variety of residents.
Between Daemons, Divs and whatever else can be found there, a lot can be justified, beyond the two main and obvious ones.