cōnsanguinitās

1. Necessarius means any one to whom one is bound by a permanent connection, whether of an official kind, as collega, patronus, cliens, or of a private nature, as familiaris, amicus, like προσήκοντες; propinquus, any one to whom one is bound by a family connection, a relation, like ἀγχιστεῖς and ἔται, as a species of cognatus and consanguineus, related by blood; affinis, a relation by marriage, or in law, like κηδεστής. 2. Cognatio is the relationship by blood existing among members of the same family, like σύναιμος; consanguinitas, the relationship of nations by derivation from a common origin, like συγγενής. Cæs. B. G. vii. 32. Hominem summæ potentiæ et magnæ cognationis: comp. with i. 11. Ambarri necessarii et consanguinei Æquorum. Liv. vii. 9. Suet. Cl. 25. Justin, xviii. 5. (v. 179.)