Knatchbull married Grace Legge, second daughter of William Legge.[5] They had five daughters and three sons.[5] He died, aged 84, and was succeeded in the baronetcy by his only surviving son Edward.[6]
^Kimber, Edward (1771). Richard Johnson (ed.). The Baronetage of England: Containing a Genealogical and Historical Account of All the English Baronets. Vol. I. London: Thomas Wotton. p. 403.
^ abDebrett, John (1824). Debrett's Baronetage of England. Vol. I (fifth ed.). London: G. Woodfall. p. 158.
^Burke, John (1832). A Genealogical and Heraldic History of the Peerage and Baronetage of the British Empire. Vol. II (4th ed.). London: Henry Colburn and Richard Bentley. pp. 46–47.