I hope to update this page in the future regarding the appearance of an "e" at the end of "Lock" in the early 1800's.
Much of the early documentation for William Lock(e) 1756 - does not have an "e" at the end - specifically, the Revolutionary War records.
Whether the "e" was later added to "Lock" or perhaps was originally dropped from "Locke" when paper work was filled out for William during the Revolutionary War, is not clear.
If someone has further information on this mystery, please let us know.
Obviously, if the original name was "Lock" - then research in William's home country of Ireland would need to look for a "William Lock".