Sierra Bronson (born April 10, 2011) is the baby daughter of Gustav and Harriet Bronson and the baby sister of Julia and Jordan Bronson.
Sierra has fair skin, blue eyes and brown hair. She has a strawberry-like birthmark on her forehead.
- Father: Gustav Bronson (1973-)
- Mother: Harriet Bronson (née: Washam) (1971-)
- Brother: Jordan Bronson (2009-)
- Sister: Julia Bronson (2008-)
- Aunts: Juliet Washam, Dorothy Bronson, Maude Washam, Ethel Bronson
- Uncles: Woodruff Bronson, James Washam, Edward Washam
- Cousins: Sally Bronson, Helen Washam, Bessie Bronson
- Grandmothers: Emily Washam, Florence Bronson
- Grandfathers: Matthew Washam, Clarence Bronson
- Her full name is Sierra Jaclyn Bronson
- Her favorite color is purple