Team Norris! 19 degrees - I also discovered in this challenge that Chuck Norris is my 16th cousin!
0: Nanette Michele (Campbell) Rohrbaugh
1: ↑ her mother, Nancy
2: ↑ her father, Walter Everett Drummond
3: ↑ his mother, Catherine E. (Harwell) Drummond
4: ↑ her father, Warren Harwell
5: ↑ his mother, Martha Patsy (Mitchell) Harwell
6: ↑ her mother, Elizabeth (Warren) Mitchell
7: ↔ her sister, Sarah Ann (Holmes) McGowan
8: = her husband, John James McGowan
9: ↔ his sister, Lucy Batte (MacGowan) Stockard
10: ↓ her son, Thomas Alonzo Stockard
11: ↔ his sister, Rosalind Deborah (Stockard) Gresham
12: = her husband, William I Gresham
13: ↔ his sister, Alice Nimmie (Jenkins) Rucker
14: ↓ her son, Andrew Caldwell Norris Sr.
15: ↑ his father, Isaac L. Norris
16: ↔ his brother, William Simon Norris
17: ↓ his son, James Henry Norris
18: ↓ his son, Ray Dee Norris
19: ↓ his son, Chuck R. Norris
For Bruce Lee:
0: Nanette Michele (Campbell) Rohrbaugh
1: ↑ her mother, Nancy May (Drummond) Campbell
2: ↑ her mother, Evelyn Willow (Lichtenberger) Drummond
3: ↑ her father, Samuel Ringgold Lichtenberger
4: ↑ his mother, Mary Jane (Colby) Lichtenberger
5: ↑ her mother, Josephine (Churchill) Colby
6: ↑ her father, Asa Churchill
7: ↑ his father, Daniel Churchill
8: ↔ his brother, John Churchill
9: = his wife, Mary (Hutchins) Churchill
10: ↑ her mother, Mary Munroe (Emery) Hutchins
11: ↑ her father, John Emery
12: ↔ his brother, Deacon Daniel Emery
13: ↓ his son, Asa Emery
14: ↓ his son, Jonathan W. Emery
15: ↓ his son, Orace Whitcomb Emery
16: ↓ his son, Orace Vernon Emery
17: ↓ his son, Everett William Emery
18: ↓ his daughter, Linda C. (Emery) Lee
19: = her husband, Jun-fan Lee
Completed!