Thank you Frank for the time and effort you contributed here. I examined all the responses and links, and have some questions.
The link to Founders and Patriots looks interesting, but I get an application pdf for joining the society, so maybe there is a different link to the data?
FindaGrave offers a lot of data, but checking with the text on the profile for Thomas Holcombe, I see that there have been questionable changes to the original gravestones. It cites no sources for the name Ferguson or the date/location of marriage.
The Four Generations of Thomas Holcombe looks good but cites a source I can't see -- the Founders and Patriots (as I said in a line above this).
I understand it is frustrating to not be able to read the entry for Thomas Holcombe in Great Migration because it is behind a pay wall at Ancestry.com and at TAG.org.
We need to discuss what Robert Charles Anderson says about Thomas and Elizabeth Holcombe in his work, Great Migration Begins, Vol 2, G - O, pages 964 - 967. Following is a quote from the Puritan Great Migration Project (aka PGM)
"Our primary source of information for PGM profiles is the Great Migration series by Robert Charles Anderson. We follow Anderson's conclusions unless there is more recent published research that corrects or adds to his."
I'm asking for your confidence, cousins. I promise to be precise in the data I transcribe or paraphrase.
Marriage: by about 1634, Elizabeth ____.... (Several sources claim that Thomas Holcombe married at Dorchester on 14 May 1634 Elizabeth Ferguson. Such a marriage is not on record, and the date is that on which Holcombe was admitted to freemanship. In 1964 Jacobus noted that "[h]er maiden name has been stated as Ferguson, without proof or probability."
'''My question is this: since we cannot seem to find any citation of evidence for her LNAB to Ferguson, what do we need to accept the opinion of Anderson and Jacobus that her maiden surname is not known?'''
(From Wikipedia on Donald Lines Jacobus:)
He established the New Haven Genealogical Magazine in 1922, which became The American Genealogist (TAG) ten years later. He served as the periodical's editor and publisher for 43 years until 1966.
On the profile for Elizabeth, wife of Thomas Holcombe, I made an effort to document known facts with footnotes on the sources, and to separate what we know from what is disputed (meaning, disputed by genealogical authorities, not meaning disputed by me).
We have a choice, to leave the profile as it is, with the surname Ferguson, and the disputed paragraphs citing the authorities, or we can change her profile back to Elizabeth Unknown, which was her identity in at least two of the profiles which were merged into Ferguson-2960.
It doesn't appear that there was a discussion at the time of the merges of what her final LNAB ought to become. So this our opportunity to hash it out and decide what we will choose for our sources: the professional and certified genealogists at Great Migration Begins and The American Genealogist, or FindaGrave and Yates and Edmund West whose sources are - and I quote - "family group sheets and electronic databases. Originally, the information was derived from an array of materials including pedigree charts, family history articles, querie."
I know what I want the choice to be, but this is a community of cousins, we are all including myself learning as we go, and we need a profile that all descendants are happy to claim as theirs.
Here are the links to Thomas Holcombe's biography in Great Migration Begins, for those who have a subscription to one or the other:
GMB - Thomas Holcombe, at Ancestry.com
GMB - Thomas Holcombe, at TAG.org