That's been a great reference since it was published last year. Thanks for reminding us, Dennis.
Not to throw this into a tangent or foment additional debate, but something I've struggled with is what to use for a place name if the pre-1776 ancestor is known not to have been an immigrant, to have been born here, but the actual colony or location of birth has never been identified. I have a few of these.
We've already confirmed "British North America" is right-out and should never be used.
Barry uses the term "Colonial Era America" on that resource page, but contemporary to English colonies in what is now the eastern seaboard of the U.S., colonial activities were afoot in North America, Central America, and South America, and by colonial powers ranging from the Dutch to the Spanish. So that doesn't seem a good catch-all designator.
Wikipedia titles its article "Thirteen Colonies," then subdivides them into the New England Colonies, the Middle Colonies, and the Southern Colonies. "The Thirteen Colonies" doesn't seem a great choice, either...especially since the 13th colony wasn't formed until 1732, leaving a hundred-year period when there weren't 13 colonies.
I admit I've simply been using "New England," and recognize that it probably isn't the best option. If for no other reason than we have over half of the colonies nowhere near what we would, today, think of as the New England area.
Still a conundrum to me. It's very much pertinent that these people were born on this continent, that they didn't emigrate, but making a wild guess about the colonial entity in which they were born seems almost as bad. Explicable in a biography box, but what to put in the the field for birth place...