Re: Jetts, Washingtons, and Oxfordshire
From my post #1671:
One study of the English men and women who emigrated to Virginia during the middle of the 17th century (during the tenure of Governor William Berkeley) whose prior residence can be documented, shows that about 75 percent of them emigrated from the counties within a triangular region in the southern part of England (about 20 percent of the land mass of England at that time).
Note that this study that I referenced states that about 75 percent of the families who emigrated to Virginia in the mid-1600s whose point of prior residence can be established came from a fairly small area in the southern part of England. That means that 25 percent came from somewhere else in England (or Scotland, Wales, etc.). This statement is perfectly consistent with the statement that I made in post #1638 about specific gentry families in Westmoreland Co., VA that I have researched who came from other parts of England and Scotland.
My "guesstimate" about the probability of two emigrant families living within 15 miles of one another in both England and Virginia is based on an observation of published maps of poplulation clusters of emigrant families on both sides of the Atlantic and my extensive background in statistics and probability theory and its application in several disciplines.