@InvictusManeo @Honkers Well sure, it wasn't necessarily a death sentence. But back then incest / inbreeding was still a common, well documented practice amongst the aristocracy.

Charles II of Spain (one of the most inbred people in history) and his engorged progeria / decorative squash head is one such example. Guy was such a genetic monstrosity that he "repeatedly baffled Christendom by continuing to live."