Ah, that would be Robyn, his "beautiful, blue-eyed daughter" referenced in so many of his essay collections?Not all book rights transfer to a big company, or an apathetic freeloader, after the author's death. Christopher Tolkien, the youngest son of J.R.R. Tolkien, considers his father's works like gold, and very carefully and lovingly shepherds them. The same with Isaac Asimov's daughter.
He knew he had a winner with one of his short stories when he let her read it and she couldn't stop crying at the end. Apparently it was a very emotional experience for her.
It's a shame Brian Herbert isn't "lovingly shepherding" Frank Herbert's legacy.