Justice Marshall writing in the minority opinon in the Venus case defined native born, or indigenes:
The Supreme Court of the United States in THE VENUS relied upon Vattels Law of Nations as the authority in determining the citizenship status of a domicil. With regard to Vattel, THE VENUS court written in the minority specifically stated, Vattel,
is more explicit and more satisfactory on it [CITIZENSHIP ISSUES] than any other whose work has fallen into my hands, says, the citizens are the members of the civil society; bound to this society by certain duties, and subject to its authority, they equally participate in its advantages. The natives, or indigenes, are those born in the country, of parents who are citizens.
I guess we all suspected this already, but it is comforting (or discomforting) to have it confirmed by people with documented affidavits.