At least two of Chidiock's sisters are recorded by name: Dorothy, first wife of Thomas Muttelbury of Jurdens, Somerset; and Mary, second wife of Sir William Kirkham of Blagdon in the parish of Paignton in Devon. At his execution Chidiock mentions his wife Agnes, one child, and his six sisters. In his letter to his wife, written the night before his execution he mentions his sisters – and also 'my little sister Babb'. Another sister is implied in a secret intelligence note to Francis Walsingham, dated 18 September 1586, in which the writer has had conference with "Jennings of Portsmouth" who reports that Mr Bruyn of Dorset and Mr Kyrkham of Devon are persons to be suspect as they had married Tychbourn's sisters.