The term "Habsburg jaw" refers to a distinctive facial feature characterized by a prominent lower jaw and an overbite. This condition is associated with the Habsburg dynasty, a powerful royal family in Europe that ruled over various territories for centuries. The genetic trait is believed to have been passed down through generations due to inbreeding, which was common among royal families to maintain power and alliances. Individuals with the Habsburg jaw often exhibit a pronounced chin and a misaligned bite, which can lead to dental issues. This feature became particularly notable in members of the Habsburg family, such as Charles II of Spain, who is often cited as a prominent example of the condition.