1. Some sources indicate John's birth in Dublin in 1653
2. Baptisms are from Christening Records Abington Parish, Glouster County, VA
3. From (no longer a valid link): 
"http://www.familytreemaker.com/users/p/i/e/Sheridan-M-Pierce/BOOK-0001/0004-0002.html":
"Son of John Mixon I. Birth also listed as 1653-55, Dublin, Ireland. 
Records of Colonial Gloucester, Mason, Vol. 1, p.15, Gloucester Rent Roll, Abington 
Parish, 1704-5, John Mixon 400 acres. Ibid, Part II, p. 54, Gloucestertowne, 1707 
(62 lots and their owners listed) John Mixon, lot #11. (This John or his son?) 
Descendents chart from World Family Tree #2521."

Additional input via Ed M.:
Capt. Moore Fauntleroy, 5350 acres north side of Rappahannock 
River, 22 May, 1650, on Farnham Creek. Transportation of 107
persons." John Mixon, one of the names mentioned.
Ancestors migrated from VA to NC then GA, SC, LA, AL & TX