Looking for more information on these same DAVIS and EVANS families. WHEN did they move to Loudoun and where did they come from in PA? Do you know more now?

John EVANS (d. 1766 Loudoun) m. Elizabeth (d. 1772 Loudoun) occ. Blacksmith
1. Griffith
2. William m. Mary HANNA (maiden name DAVIS)
3. Richard
4. David (d. Chester Co., PA)
5. Joshua (d. 1773 Loudoun) m. Martha
6. Mary m. Mr. GARDNER
7. Amy/Ann/ Emmet m. Mr. THOMAS
8. Elizabeth m. William FOX (d. 1772 Loudoun)

DAVIS siblings: Parents unknown
1. Nathan (d. 1770 Loudoun) m. Mary
2. John (still living 1794 Loudoun) m. Elizabeth occ. Wheelwright
3. Enoch (still living 1794 Loudoun) m. Judith occ. Carpenter
4. Mary (still living 1800) m. 1st to HANNA 2nd to Wm EVANS
5. Anne m. Mr. MATHIAS