Well if he was not natural born then he would have been naturalized, just as every other person alive when the Constitution was ratified. But the exception included in Article II allowed him to run for president.
No. That would only be if one accepted your silly notion that natural-born means the same thing as native-born (which it clearly does not) and that there are only two classes of citizens.
Naturalized is the past tense of a transitive verb. I know you wish to obscure the meaning of this English language that we use, but it is. Your use of this word would imply that there was some specific time when Thomas Jefferson was naturalized, which you know is nonsense. The Constitution itself refers to Jefferson as "a Citizen of the United States, at the time of the Adoption of [the]Constitution," which means he was already a Citizen of the United States at that time. There was no naturalization, but he wasn't natural-born in their eyes. Words mean things, and it is unclear to me why you should wish to deny what the Framers plainly meant.
ML/NJ