Hervey married Mariana, daughter of William P. Hodnett and widow of Ashton Benyon, in 1861. They first met at Ickworth while she was visiting, introduced by the Duke of Rutland. She was still only eighteen years old, and recently bereaved by the death of her first husband, when they married. They had five sons and two daughters. Two of their sons,
Frederick and
Herbert, both succeeded in the marquessate. Their daughter Maria married
Sir Charles Welby, 5th Baronet. Their daughter, Lady Geraldine Hervey (died 1955), was granted the rank of a marquess' daughter on 15 November 1907, and was married to London banker Henry Hoare III of
C. Hoare & Co., grandson of banker
Henry Hoare I. She became the great-grandmother of Caroline Belinda Frisby (born 1963), mother of
Olivia Grosvenor, Duchess of Westminster (born 1992). Hervey died in May 1875, aged 37. Lady Augustus Hervey remained a widow until her death in January 1920. ==References==