I see in your gile that you mention Sarah (Day) Boone, wife of Samuel Boone.I have read that her father was one Levi Day and, yes, it seems that they were Quakers.I have consulted Hinshaw's Encyclopedia and cannot find Levi Day anywhere.Perhaps if I get to Swarthmore College again, I can look in the unpublished minutes of all the old Meetings they hold.(I recall seeing the Boones in passing in Exeter MM minutes, while I was reseaching my own lines.)Of interest regarding this DAY-Boone union, I have read that they were married "about 1747" in Berks Co., PA,but I have also found that they were married 21 March 1748, in Camden Co., NC.Most reaearches say Sarah's father was Levi Day.(I have also seen it claimed that she was a dau of Leonard and Tabitha Day, but I don't think that can be correct.)Sarah, widow of Samuel Boone, died in 1819 at the home Leonard K. Bradley in Randolph County, Missouri.
I suspect Levi Day (if he was indeed the father of Mrs. Sarah Boone), as did some other Friends from PA and MD, removed to the wilderness of North Carolina.From my own research on the COX family, records are scant and there was quite a bit of moving around in those times.A few years later, when emotions ran high and they had all the troubles with the Reglator Movement, some fled north into Virginia and Pennsylvania.(And Daniel Boone had taken his family to Culpepper Co., VA for a time to get out of N. Carolina.)