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Jonathan Hornblower (1717–1780), steam engine builder, was born in Staffordshire the eldest of four children and the son of Joseph Hornblower.
Jonathan married around 1743 to Ann Carter, the only daughter of a lawyer in Broseley, Thomas Carter.
Their first child Jabez Carter Hornblower was born 21 May 1744 in Staffordshire and baptized 10 December 1744.
The following year, on 16 July 1746, a second son, Jethro, was born in Truro, Cornwall
In the years between 1744 and 1769 they had thirteen children - six sons and seven daughters. They all survived to adulthood excepting the fifth child, Jemima, who died at age three.
1740-3 Jonathan built a number of engines, beginning with one at Wheal Virgin
1744 Moved to live in Cornwall
Jonathan had an extensive practice as an engineer, eventually earning the distinction of being considered one of the principal engineers in Cornwall. The only others who attained his stature was John Nancarrow and later John Budge.
Jonathan’s younger brothers Joseph (1721) and Josiah Hornblower (1729) also worked as engineers in Cornwall.
1780 He died on December 7 at age 63
1970 A report in the Times newspaper said a Mrs Hornblower had a snuff box of his dated 1737 and an urn with his ashes dated 1780.