Cognation
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
In civil law
Signifies generally the kindred which exists between two persons who are united by ties of blood or family, or both. Civil cognation is that which proceeds alone from the ties of families, as the kindred between the adopted father and the adopted child. Mixed cognation is that Which unites at the same time the ties of blood and family, as that which exists between brothers the issue of the same lawful marriage.
Inst. 3. 6; Dig. 38. 10.
Natural cognation is that which is alone formed by ties of blood. Such is the kindred of those who owe their origin to an illicit connection, either in relation to their ascendants or collaterals.