Royal intermarriage is the practice of members of ruling dynasties marrying into other reigning families. It was more commonly done in the past as part of strategic diplomacy for national interest. ... Marriage between dynasties could serve to initiate, reinforce or guarantee peace between nations.

Who is the most inbred royal?

At the other end of the scale is Charles II, King of Spain from 1665 to 1700, who was determined to be the 'individual with the highest coefficient of inbreeding', or the most inbred monarch.

Is there inbreeding in the royal family?

Inbreeding May Have Been a Practice of Old Royal Families but That Isn't the Case Today. ... From a scientific perspective, there's a coefficient of separation or a coefficient of inbreeding that determines whether or not two mates have a higher chance of producing offspring without deleterious health issues.