At common-law, with the nomenclature of which the framers of the Constitution were familiar, it was never doubted that all children born in a country of parents who were its citizens became themselves, upon their birth, citizens also. These were natives, or natural-born citizens, as distinguished from aliens or foreigners.
Yeah, and the next line says that some have supported born on soil only. And then they go on to say that the answer to the soil only question was not germane to the case, so it would not be ruled on.
And a later case, US vs Wong Kim Ark supported jus soli. Their interpretation was that being born in the US to parents not subject to a foreign government granted citizenship at birth. And the court argued that the English common law at the time of the founding regarding natural born citizenship would grant citizenship unless the person had parents who were foreign diplomats, born on foreign ships, or born to a country we were at war with.