[DiogenesLamp]

All 7 were considered Natural Born Citizens of the United States of America, even though the landmass had come under different leadership, as well as, a name change. Citizens before & after the process that had taken place, and all 7 were born within that landmass, before & after the process.

"Subjects" before, "Citizens" after. (After 1776.)

They deliberately changed the term of attachment to the nation from Monarchy to Republican.

Nobody was born a "Citizen" prior to 1776. (Except people in Switzerland, the only Republic in the world at the time.)

[Verginius Rufus]

I think Ragusa (Dubrovnik) was a Republic in 1776.

[Robert DeLong]

Semantics, matters not.

[Robert DeLong]

Furthermore, you ignored the fact that they had declared independence, and I had failed to mention that, which stated they were no longer subjects of the King of England, but were instead now citizens of the emerging nation of The United States of America.

Thus citizens before, and citizens after the Constitution was crafted and adopted by all of the states, of the now established United States of America.