Also, i've posted that lawbook from Pennsylvania which flat out says our "citizenship" comes from Vattel, and the people most likely to know what was intended by the Convention (held in Philadelphia in 1787) was the Philadelphia legal community, which is exactly where that book came from.
Pennsylvania, Act of 1777
An Act to revive and put in force such and so much of the late laws of the province on Pennsylvania, as is judged necessary to be in force in this commonwealth, and to revive and establish the Courts of Justice, and for other purposes therein mentioned.II.
Be it therefore enacted, and it is hereby enacted,
That each and every one of the laws or acts of General Assembly, that were in force and binding on the inhabitants of the said be province on the fourteenth day of May last, shall be in force from and binding on the inhabitants of this state from and after the tenth day of February next, as fully and effectually, to all intents and purposes, as if the said laws, and each of them, had been made or enacted by this General Assembly; and all and every person and persons whomsoever are hereby enjoined and required to yield obedience to the said laws, as the case may require until the said laws or acts of General Assembly respectively shall be repealed or altered, or until they expire by their own limitation; and the common law and such of the statute laws of England as have heretofore been in force in the said province, except as is hereafter excepted.
It is a general statement that the existing law should continue, *EXCEPT* where it is found to be in conflict with principles of American law.
Citizenship is one such case where English law is incompatible with American principles.