Beatrice had been given way more children than we actually have evidence for. Herzog wasn't one of them, and would have been born long after her death, so he is detached.
Cunigunde bothers me -- she isn't listed in Medlands, and I'm only finding her in unsourced web trees, and the birth date, though it is of course a guess, comes long before her parents were betrothed. But I left her for the moment.