His father, also named Freeman Wills Crofts, was a surgeon-lieutenant in the Army Medical Service, but he died of fever in Honduras before the young Freeman Wills Crofts was born.
Ayahnya, yang juga bernama Freeman Wills Crofts, adalah seorang dokterbedah-letnan dalam Army Medical Service, namun ia wafat akibat demam di Honduras sebelum Freeman Wills Crofts lahir.