The family in question is the habsburgs.
Modern habsburg jaw.
The most salient indicator of the family s inbreeding the habsburg jaw is what doctors refer to as mandibular prognathism.
But while the line was intact this inbreeding caused this royal family to exhibit a number of peculiar physical traits especially one known as the habsburg jaw.
The researchers led by geneticist román vilas from spain s.
A new report at smithsonian takes a look back at one of the most distinctive features of a royal family that once ruled much of europe over the course of several centuries.
Also called the habsburg lip and the austrian lip the habsburg jaw is a physical condition known by the modern term mandibular prognathism.
It is characterized by a jutting lower jaw that is often accompanied by an abnormally thick lower lip and sometimes a tongue that is abnormally large.
Besides their long stints in the thrones of numerous countries they re also known for the distinctive habsburg jaw.