Lord Thanos was the head of House Thanos
Lord Thanos learned how foolish it is to challenge Hendrake. As his House, House Thanos, tried to become one of the Major Houses of Chaos, he and his families were cut down by the backers of the LeRat coalition. Although he perished in personal combat with Lord Kiron, many of his people, who have since been subsumed into hendrake, tell of his eventual return.
Drawing this Trump in a spread indicates loose ends.