The Habsburg jaw can be attributed to inbreeding - https

The Habsburg Jaw - by Charlie Sosnick - Chazzy's World

Inbreeding Caused the Distinctive 'Habsburg Jaw' of 17th Century Royals That Ruled Europe

If inbreeding is so bad, why does it happen in nature? - Quora

Is the “Habsburg jaw” related to inbreeding?: Annals of Human Biology: Vol 46, No 7-8

Inbreeding Caused Habsburg Jaw For Royals Many of the kings and queens of the Spanish Habsburg dynasty, which ruled across Europe from the 16th to the start of the 18th century

16 Royals Who Suffered From Hereditary Mutations And Defects Caused By Inbreeding

Royal portraits confirm Habsburg jaw was caused by inbreeding

Royal portraits confirm Habsburg jaw was caused by inbreeding

The Habsburg Jaw and Other Royal Inbreeding Deformities - Owlcation

inbreeding – News Stories About inbreeding - Page 1

Figure 1 from Retrognathic maxilla in Habsburg jaw. Skeletofacial analysis of Joanna of Austria (1547-1578).