It appears that the entire strata of profiles above William and Elizabeth are unsourced. I am not sure if there are sources for these folks or if this was just some conjecture on the point of an amateur genealogist. Once put on the net, this family line has been repeated and can be found on Find a Grave, Rootsweb, Ancestry, and other websites.
I searched for many of the names in the next generation (Harry, Elizabeth, & Lord William) via Family Search, Ancestry, Google, and through other channels and I can find no academic mention of any of these people.
Unfortunately, and I hope I'm wrong, this line seems to be a history of fantasy.