Intertwining families. Hmmm. I'm thinking about that, even before you ask. This will seem all too fuzzy, but the research to support it would send us sprawling in too many directions.
There are certain blue blood Virginia families. They all intermarry. If you look at them over the course of many years, you get a sense for the "rhythm" of their intermarriage. You recognize the family names.
My sense from this "gut impression" is that something is wrong. Maj. John of Northumberland Co doesn't quite fit. His mother is a Cocke. HIs wife is a Semmes. He leaves money to Harrisons. He should be a closer relative of the prominent Wests. Instead, his dad is just an immigrant and the Harrisons in his will are just some people who lived in Virginia at the same time.
And, there is Maj. John of Gloucester. A prominent, early West. An officer, which means gentry. Connected to Cockacoeske and Toby West, so somehow related to the family of Gov. West.
I"m not at all opposed to the idea that there might have been more than one West family in Virginia, or the idea there has been massive confusion. But, a West at the level of the Cockes and Harrisons -- that early -- really should be one of The Wests.
Move Jane Harrison maybe. Her relationship to Cockacoeske seems to rest on circumstantial evidence anyway, Remove that, and she's no longer half-sister of John Gloucester Co, which isolates him from her husband's Harrison family, But then, there seems to be no way to insert her into the family of John of Northumberland's family so his legacies to the Harrisons are just random charity.
If these two are not the same man, they should be very close associates and relatives. I'm not a fan of guesswork or working by gut, but when the relationships fall out illogically, as they are beginning to do here, something is wrong.