ⓘ Consanguinity means being of the same kinship as another person. Consanguinity also means being descended from the same ancestor as another person. The laws of ..


ⓘ Consanguinity

Consanguinity means being of the same kinship as another person. Consanguinity also means being descended from the same ancestor as another person. The laws of many jurisdictions set up degrees of consanguinity when prohibiting sexual relations and marriage. Rules of Consanguinity are also used to determine heirs of an estate. These are according to laws that govern intestate succession. These vary from jurisdiction to jurisdiction.


1. History

Most cultures have prohibited marriages between individuals who are closely related by blood consanguinity. There were some exceptions. Brothers and sisters, as well as fathers and daughters, often married in ancient Egypt. These were primarily limited to the royal family from the earliest times. Some theories hold that it strengthened a Kings claim to the throne. In biblical history, Abraham married his half-sister Sarah.

Most early societies had rules or laws that limited consanguineous marriages. So the dangers of inbreeding must have been known to them.


1.1. History Roman civil law

In ancient Rome, marriage was governed by civil laws. Under Roman civil law couples were forbidden to marry if they were within four degrees of consanguinity. The Germanic peoples also had rules against such marriages but were not as strict.


1.2. History Medieval Europe

In the 5th century, after the Roman empire collapsed, the church took over regulating marriage. At first they did not have a great deal of influence. The Churchs power over marriage grew gradually. At first the Church followed Roman civil law. In the ninth century the church raised the number of prohibited degrees to seven. They also changed the method by which they were calculated. The nobility of Europe usually married from within their own social class. Eventually they became too interrelated to marry by the Churchs rules. Many found it necessary to defy the Church. In 1215 the Fourth Lateran Council reduced the number of prohibited degrees of consanguinity from seven back to four. The pope had the power to waive the rules for particular couples. Frequently, papal dispensations were given allowing closely related couples to marry. These were almost always reserved for the royalty and nobility. Sometimes the Church used consanguinity to block marriage as in the case of William the Conqueror and Matilda of Flanders. In 1049 Pope Leo IX refused to allow the marriage. He did not give a reason but the two were cousins. They married anyway. Ten years later, in 1059, Pope, Nicholas II finally granted a dispensation for their marriage. Despite restrictions and laws, up to the 20th century consanguineous marriages were not uncommon in Europe.


2. Common ancestor

The degree of consanguinity can be illustrated with a consanguinity table. Each level of lineal consanguinity i.e., generation or meiosis appears as a row. Individuals with a collaterally consanguineous relationship share the same row. Consanguinity blood relationship is different from Affinity relationship through marriage but have been prohibited in the same degrees in the past.

  • book, called Systems of Consanguinity and Affinity of the Human Family There are two main types of kinship. Consanguinity means to be related by blood
  • more people as a result of somebody s marriage. It is different from consanguinity blood relationship Affinity is the relationship which each party
  • siblings have one common parent, while their unshared parents have a mean consanguinity of 50 This means that the unshared parents are either siblings or
  • including family relationships, being related to someone else by blood consanguinity For example, there is fatherhood or motherhood. Kinship relationships
  • degree of consanguinity they were fourth cousins During this period in time canon law prohibited any marriage within seven degrees of consanguinity sixth