- Born: - Died: -
Henry O'Neill was awarded one of two first-class premiums by the Royal Dublin Society's School of Drawing in Architecture on 18 December 1823. He may be the same person as the Henry O'Neill who was admitted to the School on 7 November 1816.(1) Possibly both references are to the artist and antiquarian Henry O'Neill (1800-1880).
(1) MS. transcript from Royal Dublin Society minutes of School of Drawing in Architecture admissions and prizewinners (in IAA).