- Born: - Died: 1831
Harbour engineer to the Fisheries Commission, from June 1825 until 1830 when the duties of the commission were transferred first to the Board of Inland Navigation and then, in 1831, to the new Office of Public Works. The post of harbour engineer, to which Donnell was appointed, was a new one, created in order to relieve ALEXANDER NIMMO  of some of his many responsibilities. Donnell inspected Nimmo's piers and harbour works in hand, cancelling some projects and modifying others. Donnell was married to Catherine Hussey with whom he had five children, Mary Anne, Catherine, Priscilla, Anne and Nicholas. He died, probably at Waterstown, near Naas, Co. Kildare, on 26 April 1831. A death notice for him can be found in the Cork Constitution, 3 May 1831.
Information relating to Donnell's family history was kindly contributed by William Mitchell, Bluffton, SC, a descendant (by email, April, 2017). All other information is from Noel P. Wilkins, Alexander Nimmo, Master Engineer, 1783-1832: public works and civil surveys (Irish Academic Press, 2009), passim.