Yes exactly, Jillaine!
We have not differentiated the ''template'' for a) and b) - it is identical in both cases.
We have added a ''Category:Gateway Ancestors'' to the gateway person.
What I have learned in this project is that people think of the same concept in different ways, so I've been working on getting the most accurate, least confusing, most specific description of the terms to use on the Magna Carta project.
For example, it turns out that ''Gateway Ancestor'' may be considered to mean a gateway to royal ancestors, and our project means it as a gateway to Magna Carta Ancestors. I have been making the difference explicit in the project pages.
Most of the Gateway Ancestors are from the 17th century, and a few are from 1701, according to Richardsons's "Purpose and Scope". There isn't a narrow time frame, like for Puritan Great Migration, but requrements are narrow in that the lineage to Magna Carta barons must be documented. Many more are descended from surety barons than those we are working with in our project, but documenting them is harder. We have the "Potential Gateway Ancestors" page where members can post lineages they have documented.
Yes the number of ancestor profiles would be very large, but it is diminshed by converging lineages (noted as such by Richardson). Those Medieval barons kept the property, wealth and power "in the family" so to speak. Intermarriage among the families decreases the potential number of individuals in the tree as the branches weave back together.
I would be delighted for anyone who is a descendant of those who did not migrate to the New World, to join the project and work on the profiles earlier than the Gateway immigrants, where their tree joins the Magna Carta descendants. (But being a descendant is not required for the project.)
There is a misapprehension that the project requires descendancy from a Gateway Ancestor. No, just interest in the project is sufficient, and descendancy from one of the Magna Carta descendant profiles is a bonus.
I appreciate your questions Jillaine, they always create clarity.