CFA was born in Boston. His father (born in Quincy MA) and his mother (born in London) would have become American citizens with the Revolution and independence.
There's a gray area there -- what did happen with the citizenship of Americans who were living abroad through the Revolutionary period? -- but since Louisa Johnson Adams's father became an American consul in London and her uncle signed the Declaration of Independence, I'm going to assume that she became a US citizen by the time the Constitution was ratified.
Who was Louisa Johnson’s uncle? No one with the surname Johnson signed the Declaration of Independence. Her father was an American merchant living in London at the time she was born—he was appointed a consul later, after Britain recognized US independence. She grew up in England and in France and was married in London—I don’t know if she had been to the US before 1801. But I think having a citizen father would have made her a US citizen. Reportedly John Adams initially was opposed to John Quincy marrying a “foreigner.”