The Illwrack (sometimes spelled Ilwrack) are a clan of dwenda, respected as a royal house, and the instigators and leaders of the Repossession. Risgillen is a prominent member of the clan. They were responsible for raising the Illwrack Changeling.

Anasharal says this of the Human children taken by the Illwrack clan:

"To be chosen by the clan Ilwrack was the highest of honors. Its scions took only the very best and the brightest, opened to them every secret of the Aldrain race, and then flung them back into the world as their most powerful and faithful servants. For this has ever been the way of the Aldrain— not to rule subject races by their own hand, but to find those among the subject race who can be groomed and fit to rule on their behalf."