House Barimen Linage
Dworkin is the top of House Bariman but his siblings have houses as well. Dworkin is the son of one Swayvill, the younger brother of a Swayvill and the older brother of a Swayvill.
When one assumes the throne of Chaos they discard their previous names to assume the name Swayvill. While the throne of Chaos is not strictly speaking hereditary it trades among a small collection of powerful houses. Helgram, Chanicut, Hendrake, Jesby, Gallowglass, Caryx, Ashoka, all have had High Lords of Chaos and are in the mix when the title changes.