On 8 July 1816 he married Alicia Anne Gordon, eldest daughter of George Gordon, Esq. He lived at
Raehills in
Lockerbie (where he considerably extended the house but faced "estate debts"), • William James Hope Johnstone (1819–1850), who married Hon. Octavia Sophia Bosville Macdonald, daughter of Lt.-Gen.
Godfrey Macdonald, 3rd Baron Macdonald and Louisa Maria la Coast (an illegitimate daughter of
Prince William Henry, Duke of Gloucester and Edinburgh), in 1841. • George Gordon Hope Johnstone (1820–1866), a Captain who married Adelaide Mary Wentworth Sinclair, daughter of
Sir George Sinclair, 2nd Baronet, in 1845. • Robert Gordon Hope Johnstone (1829–1890), who married Agnes Swanson, daughter of Col. John Swanson, in 1855. • Charles Hope Johnstone (1830–1855), a Lieutenant in the
Royal Navy. • Alice Hope Johnstone (d. 1890), who married
Sir Graham Graham-Montgomery, 3rd Baronet, a son of
Sir James Montgomery, 2nd Baronet, in 1845. • David Baird Hope Johnstone (d. 1886), a Captain in the
92nd Highlanders who married Margaret Elizabeth Grierson, daughter of Lt.-Col. William Grierson, in 1860. After they divorced, he married Eliza Archer, daughter of T. Archer, in 1874. The cause of his death in 1876 was given as "general decay". As his eldest son William predeceased him, the claim to the
earldom of Annandale and Hartfell passed to his grandson,
John Hope Johnstone (1842–1912). == References ==