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  2. Coefficient of relationship - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_relationship

    The coefficient of relationship is a measure of the degree of consanguinity (or biological relationship) between two individuals. The term coefficient of relationship was defined by Sewall Wright in 1922, and was derived from his definition of the coefficient of inbreeding of 1921.

  3. Consanguine marriage - Wikipedia

    en.wikipedia.org/wiki/Consanguine_marriage

    Consanguine marriage is marriage between individuals who are closely related. Though it may involve incest, it implies more than the sexual nature of incest.In a clinical sense, marriage between two family members who have coefficient of relationship r = 3.125% (i.e. second cousin, first cousin twice removed, half-first cousin once removed, great-great-great-grandmother / great-great-great ...

  4. Legality of incest - Wikipedia

    en.wikipedia.org/wiki/Legality_of_incest

    A prohibited degree of relationship would be that of a parent and their natural or adoptive child, a step-parent and their step-child, whether the step-child's parent and step-parent are married under the Marriage Act [Chapter 5:11] or the Customary Marriages Act [Chapter 5:07], or are parties to an unregistered customary law marriage, and ...

  5. Cousin marriage - Wikipedia

    en.wikipedia.org/wiki/Cousin_marriage

    A cousin marriage is a marriage where the spouses are cousins (i.e. people with common grandparents or people who share other fairly recent ancestors). The practice was common in earlier times and continues to be common in some societies today, though in some jurisdictions such marriages are prohibited. [1]

  6. Keeping it in the family: Can you marry your first cousin in ...

    www.aol.com/news/keeping-family-marry-first...

    Marriages between first cousins are legal in 19 states. For premium support please call: 800-290-4726 more ways to reach us

  7. Cousin marriage law in the United States - Wikipedia

    en.wikipedia.org/wiki/Cousin_marriage_law_in_the...

    Five states prohibit first-cousin-once-removed marriages. [4] Some states prohibiting cousin marriage recognize cousin marriages performed in other states, but despite occasional claims that this holds true in general, [5] laws also exist that explicitly void all foreign cousin marriages or marriages conducted by state residents out of state.

  8. Prohibited degree of kinship - Wikipedia

    en.wikipedia.org/wiki/Prohibited_degree_of_kinship

    first cousins (which is counted as fourth degree of kinship in Roman civil law tradition) In Imperial China (221 BCE to 1912), marriage between first cousins was partially allowed. Marrying the child of one’s paternal aunt, maternal uncle, or maternal aunt was generally accepted in Chinese history during most of China’s dynastic era.

  9. Consanguinity - Wikipedia

    en.wikipedia.org/wiki/Consanguinity

    In Egypt, around 40% of the population marry a cousin. A 1992 survey in Jordan found that 32% were married to a first cousin; a further 17.3% were married to more distant relatives. [35] 67% of marriages in Saudi Arabia are between close relatives as are 54% of all marriages in Kuwait, whereas 18% of all Lebanese were between blood relatives ...