On 1 June 1818 at
New Kilpatrick in
Dunbartonshire, Scotland, Sitwell was married to artist Susan Murray Tait (1798–1880), daughter of
Crauford Tait of
Harviestoun and Susan (née Campbell) Tait (a daughter of
Ilay Campbell, Lord Succoth). Among her siblings were
The Most Rev. Archibald Campbell Tait,
Archbishop of Canterbury. Together, they were the parents of: •
Sir Sitwell Reresby Sitwell, 3rd Baronet (1820–1862), who married Louisa Lucy Hely Hutchinson, daughter of Col. Hon. Henry Hely Hutchinson (brother of the
3rd Earl of Donoughmore) and Harriet Wrightson (a daughter of
William Wrightson), in 1857. • Mary Elizabeth Anne Sitwell (1822–1909), who married
Sir George Osborn, 6th Baronet, son of
Sir John Osborn, 5th Baronet and Frederica Davers (an illegitimate daughter of
Sir Charles Davers, 6th Baronet), in 1871. • Georgina Caroline Sitwell (1823–1900), who married, as his second wife,
Archibald Campbell Swinton, 3rd of
Kimmerghame, son of John Campbell
Swinton, 2nd of Kimmerghame and Catherine Rannie, in 1856. • Charlotte Lucy Hurt Sitwell (1826–1907), who married her cousin, Herwald Craufurd Wake, son of
Sir Charles Wake, 10th Baronet, and Charlotte Tait, in 1860. • George Frederick Sitwell (1828–1884), a Captain in the
1st Life Guards; he married Cecilia Fanny Fitzroy, daughter of Henry Fitzroy (a son of Rev.
Lord Henry Fitzroy and grandson of the
3rd Duke of Grafton) and Jane Elizabeth Beauclerk (a daughter of
Charles George Beauclerk), in 1857. • Susan Rose Blanche Marion Sitwell (b. 1842), who died unmarried. Sir George died on 12 March 1853 at age 55 and was succeeded in the baronetcy by his eldest son,
Sitwell Reresby Sitwell. ==References==