White was born as Eirene Botting to parents Cecil and Christine Botting. She later took her mother's maiden name, White. Her father taught Greek and Latin at St. Paul’s School. She was baptized in the Protestant Church of England but converted to Roman Catholicism at the age of 9 when her father converted. She struggled with religion and did not feel that she fitted in with the other girls at her school, many of whom were from upper-class Catholic families. She attended the Convent of the Sacred Heart, Roehampton (later Woldingham School, Surrey).