Wylda Rae Johnson was born on 7 July 2010 in London, United Kingdom. She is the daughter of renowned British actor Aaron Taylor-Johnson and acclaimed filmmaker and visual artist Sam Taylor-Johnson. Her mother’s full name is Samantha Louise Taylor-Johnson, born on 4 March 1967 in Croydon, London. Her father, Aaron Taylor-Johnson, was born on 13 June 1990.
Wylda's maternal grandparents are David Wood and Geraldine Wood. David left the family when Sam Taylor-Johnson was nine years old. Geraldine Wood, Wylda’s grandmother, is known for her work as a yoga instructor and an astrologer. Wylda also has a younger sister named Romy Hero Johnson.
On her mother's side, Wylda has an aunt named Ashley and a maternal half-uncle, Kristian. On her father's side, Aaron Taylor-Johnson's parents are Mark, a civil engineer, and Sarah, a homemaker (correction: her name is Sarah, not Helen). He has one sister named Gemma. Although often noted as having Jewish heritage, Aaron has not publicly described his family as "very religious."