Actually, sriously, there is an inherited trait called "Hapsburg jaw" (a protruding lower jaw) that can and *should* be corrected through surgery. I know a man who has had this surgery, and his daughter, who inherited the trait, will also have the surgery when she is old enough. So if Kerry had this condition, I would not blame him for having that surgery.
Botox, however, is another matter.
It wasn't protruding, it was just hangin' around down there.
The only inherited trait connected to the Habsburgs, that I know of, is the Hapsburg lip (die Hapsburger Lippe). This was a trait that is evident in old paintings which showed the lower lip as prominent. A Hapsburg jaw is a new one on me. If it's rare, I'm sure Lurch has it.