| An introduction to the 'Liber Antiquissimus Civitatis Waterfordiae' | Byrne, Niall J. | Article in Journal | | 2004 |
| Reformation in Elizabethan Waterford | Byrne, Niall | Article in Journal | | 2001 |
| The great parchment book of Waterford = Liber antiquissimus civitatis Waterfordiae | | Monograph or Collective Volume | Irish Manuscripts Commission | 2007 |
| The great parchment book of Waterford = Liber antiquissimus Civitatis Waterfordiae | | Monograph or Collective Volume | Irish Manuscripts Commission | 2007 |
| The Irish crusade : a history of the Knights Hospitaller, the Knights Templar, and the Knights of Malta, in the south-east of Ireland | Byrne, Niall J. | Monograph or Collective Volume | Linden Publishing | 2007 |
| The Irish Order of St Thomas the Martyr of Acre | Byrne, Niall | Article in Journal | | 2009 |
| The Waterford Leper Hospital of St. Stephen and the Waterford County and City Infirmary : a history of institutional medicine in Waterford | Byrne, Niall | Monograph or Collective Volume | Linden Publishing Services | 2011 |
| The Yank from Mourne Abbey, part 3 | Byrne, Niall J. | Article in Journal | | 2005 |
| The Yank from Mourne Abbey. Part 4 | Byrne, Niall J. | Article in Journal | | 2006 |
| The Yank from Mourneabbey, Part I | Byrne, Niall J. | Article in Journal | | 2003 |