Cognation Law and Legal Definition

Cognation is a term with different meanings. The term may be used to refer to relationship by blood, rather than by marriage. It is a relationship that arises through common descent from the same man and woman. The descent may be traced through males or females.

In Civil law, the term ‘cognation’ is used to refer to a relationship existing between two persons by blood, by family, or by both.

The term ‘cognation’ may also be used to refer to relationship between persons or things of same or similar nature. Relationship based on likeness.