Natus

Born; already born; alive.

Agnati.

Persons related through a male as their father — ad eum nati.

Cognati.

Persons related through a woman as their mother. Anglicised "agnates" and "cognates." In Roman law, the agnate family consisted of such cognates (blood-relations) as could trace their lineage through males alone (father, grandfather, etc.) up to a common male ancestor, whose family-name they all bore, and to whose patria potestas they would have been subject had he lived to their time. But persons brought into a family by adoption became agnates; and those who passed out of it either by adoption or emancipation ceased to be agnates (though still cognates).* Ante natus. Born before; a child born before another person, or prior to a particular event.

Post natus

Born after; afterborn.

Nasciturus

Yet to be born; unborn.