Rosemary Pollock is the daughter by the writer Ida Pollock and Major Hugh Alexander Pollock, editor of the book department in the publishing firm of George Newnes. Before marrying her mother, her father divorced from the Children's writer Enid Blyton, with whom he had two daughters. Rosemary didn't have much relation with her half-sisters, Gillian Mary Baverstock (1931-2007) and Imogen Mary Smallwood (1935). Her father died in Malta in 1971.

Rosemary Pollock decided to follow in the footsteps of her mother and