Smyth was twice married. His first marriage was to Sarah Caroline Ibbetson, daughter of Henry Ibbetson of St. Anthony's, on 5 July 1810, but she died the following year on 29 May 1811 aged just 25. •
Henry Smyth (1816–1891), an Army officer who married Rebecca Mary Peirce, daughter of Thomas Peirce.
Descendants Through his son John, he was a grandfather of Diana Smyth, who married
Henry Lascelles, 4th Earl of Harewood. ==References==