David Lynch is 23 Degrees from Aymer I de Valence

0. David Lynch
   →
1. ✖Patricia O'Hern
   (his mother)→
2. ✖Colquitt O'Hern
   (her father)→
3. ✖Lucy Kiser
   (his mother)→
4. ✖Joseph Kiser
   (her father)→
5. ✖Lucinda Daniel
   (his mother)→
6. ✖Joseph Daniel
   (her father)→
7. ✖Joseph Daniel
   (his father)→
8. ✖John Daniel
   (his father)→
9. ✖William Daniel
   (his father)→
10. ✖Elizabeth Williams
    (his mother)→
11. ✖Anne Weston
    (her mother)→
12. ✖Mary Cave
    (her mother)→
13. ✖Elizabeth Lovett
    (her mother)→
14. ✖Thomas Lovett
    (her father)→
15. ✖Elizabeth Boteler
    (his mother)→
16. ✖John Boteler
    (her father)→
17. ✖Philip Boteler
    (his father)→
18. ✖Elizabeth Cokayne
    (his mother)→
19. ✖Ida Grey
    (her mother)→
20. ✖Reynold Grey
    (her father)→
21. ✖Elizabeth Hastings
    (his mother)→
22. ✖Isabel Valence
    (her mother)→
23. Aymer I Valence
    (her brother)

David is the 20th great grandnephew of Aymer I

David Lynch and Aymer (Valence) de Valence (abt.1270-1324) are both descendants of Joan (Munchensy) de Valence (1222-bef.1307).

1. David is the son of Patricia Jeanne O'Hern (1934-2017) 
2. Patricia is the daughter of Colquitt Logan O'Hern (1908-1983) [unknown confidence]
3. Colquitt is the son of Lucy Emma Kiser (1881-1964) [confident]
4. Lucy is the daughter of Joseph Quinn Kiser (1846-1937) [unknown confidence]
5. Joseph is the son of Lucinda (Daniel) Kiser (1812-abt.1880) [unknown confidence]
6. Lucinda is the daughter of Joseph Daniel Jr (abt.1784-abt.1872) [unknown confidence]
7. Joseph is the son of Joseph Daniel Sr (bef.1730-1795) [unknown confidence]
8. Joseph is the son of John Daniel (abt.1704-1754) [confident]
9. John is the son of William Daniel (abt.1663-1750) [confident]
10. William is the son of Elizabeth (Williams) Daniel (abt.1623-1702) [unknown confidence]
11. Elizabeth is the daughter of Anne (Weston) Williams (abt.1574-abt.1629) [confident]
12. Anne is the daughter of Mary (Cave) Weston (1556-abt.1593) [confident]
13. Mary is the daughter of Elizabeth (Lovett) Weston (1521-1577) [confident]
14. Elizabeth is the daughter of Thomas Lovett Esq. (abt.1488-1523) [confident]
15. Thomas is the son of Elizabeth (Boteler) Lovett (1475-abt.1514) [confident]
16. Elizabeth is the daughter of John Boteler (abt.1435-aft.1491) [confident]
17. John is the son of Philip Boteler Gent (abt.1414-abt.1453) [confident]
18. Philip is the son of Elizabeth (Cokayne) Cheyne (abt.1390-aft.1449) [confident]
19. Elizabeth is the daughter of Ida (Grey) Cokayne (abt.1355-1426) [confident]
20. Ida is the daughter of Reynold (Grey) de Grey (abt.1323-1388) [unknown confidence]
21. Reynold is the son of Elizabeth (Hastings) Grey (1294-1352) [confident]
22. Elizabeth is the daughter of Isabel (Valence) de Hastings (abt.1260-1305) [unknown confidence]
23. Isabel is the daughter of Joan (Munchensy) de Valence (1222-bef.1307) [unknown confidence]
This makes Joan the 21st great grandmother of David. Note: David is descended from Joan in more than one way (3). 

1. Aymer is the son of Joan (Munchensy) de Valence (1222-bef.1307) [unknown confidence]
This makes Joan the mother of Aymer.