Holman-Hunt was the granddaughter of painter William Holman Hunt, a founder of the Pre-Raphaelite Brotherhood in 1848. Her first marriage was to Villiers A'Court (Bill) Bergne, and her second to David Cuthbert. Her son Paul Bergne was a leading British expert on Central Asia. Her published books were:
- My Grandmothers and I (1960) - her unusual childhood with two eccentric grandmothers, both highly stationed in British society.
- My Grandfather, His Life and Loves (1969) - her grandfather William Holman Hunt.
- Latin Among Lions (1974) - the Chilean painter Álvaro Guevara.