Henry Charles Keith Petty-Fitzmaurice, 5th Marquess Of Lansdowne was born on 14 January 1845. He was Irish national and known as Government Official.
Hugh O'Neill, Earl Of Tyrone was born on 1550 AD. He was Irish national and known as Author.
Hugh Roe O'Donnell was born on 30 November 1572. He was Irish national and known as Ruler.
James Bronterre O'Brien was born on 31 January 1805. He was Irish national and known as Journalist.
John O'Mahony was born on 1815 AD. He was Irish national and known as Scholar.
Liam O'Flaherty was born on 28 August 1896. He was Irish national and known as Writer.
Manus O'Donnell was born on . He was Irish national and known as Government Official.
Nuala O'Faolain was born on 01 March 1940. He was Irish national and known as Journalist.
Robert O'Hara Burke was born on 06 May 1821. He was Irish national and known as Explorer.
Roderic O'Connor was born on 17 October 1860. He was Irish national and known as Painter.
