“And the children of citizens of the United States that may be born beyond Sea, or out of the limits of the United States, shall be considered as natural born Citizens”
The quotation demonstrates the children are naturalized citizens who are not natural born citizens.
Whatever.
The Congress of 1790 decided they should be considered as natural born citizens. The Congress of 1790 included Founders. Therefore, the 1790 Act is excellent evidence of what the NBC term meant to the Founders.