Knatchbull married twice. His first wife was Annabella Christiana Honywood, daughter of
Sir John Honywood, 4th Baronet and Hon. Frances Courtenay. They married on 25 August 1806 and had six children: • Mary Louisa Knatchbull (b. 1808) • Mary Dorothea Knatchbull (d. 1838), who married in 1826 Edward Knight • Sir Norton Joseph Knatchbull, 10th Baronet (1808–1868), who married in 1831 Mary Watts-Russell. They were parents of the 11th and the 12th Baronets. • (child, d. 1818) Annabella died in childbirth in 1814 and on 24 October 1820, Knatchbull married secondly
Fanny Catherine Knight, daughter of
Edward Knight (né Edward Austen, the brother of English novelist
Jane Austen). They had nine children, including: •
Edward Hugessen Knatchbull-Hugessen, 1st Baron Brabourne (1829–1893) • Reverend Reginald Bridges Knatchbull-Hugessen (1831–1911), who married firstly in 1866 Mary Brockman and secondly in 1885 Hon. Rachel Montgomery and had issues by both wives •
Herbert Thomas Knatchbull-Hugessen (1835–1922) •
William Western Knatchbull-Hugessen (1837–1864) • Eleanor Grace Knatchbull (d. 1913), who married in 1857 Robert John O'Reilly Knatchbull died in May 1849, aged 67, at the family's Mersham Hatch estate in Kent, and was succeeded in the baronetcy by his son from his first marriage, Norton. Lady Knatchbull died in December 1882. ==References==