On 26 March 1798, Champion de Crespigny was married to Augusta Charlotte Thellusson (d. 1853), a daughter of merchant
Peter Thellusson and granddaughter of Genevan banker and diplomat
Isaac de Thellusson. Among her siblings were
Peter Isaac Thellusson, 1st Baron Rendlesham,
George Woodford Thellusson, and
Charles Thellusson, who all served as Members of Parliament. Her younger sister, Anne Thellusson, was the wife of
Vice-Admiral William Lukin. Before his death, they were the parents of: • Augusta Anne Champion de Crespigny (–1892), who married Col.
Thomas Henry Hastings Davies of
Elmley Castle, MP for
Worcester, who fought with the Duke of Wellington in the Peninsular and at Waterloo, before 1846. After his death she married
Sir John Pakington, Bt, the
Secretary of State for War who was a son of William Russell and Elizabeth
Pakington, in 1851. In 1874 he was made
Baron Hampton and Augusta became Baroness Hampton. Champion de Crespigny died on 2 August 1799. His widow married Sir Joseph Whatley,
KCH on 3 February 1827 before her death on 24 July 1853. ==References==