| 'Mise liom féin lom dáiríre': Seosamh Mac grianna agus leathchairde a linne | de Brún, Fionntan | Article in Book | | 2016 |
| 'Ulsteria' : the fortunes of the Irish language under Stormont, 1921-72 | De Brún, Fionntán | Article in Book | | 2010 |
| An Gruagach Gréagach: Gearóid ó Nualláin, 'Beatha duine a thoil' agus 'An Béal Bocht' | de Brún, Fionntán | Article in Book | | 2019 |
| Belfast and the Irish language | De Brún, Fionntán | Monograph or Collective Volume | Four Courts Press | 2006 |
| Comhluchd Chlanna Ghaoidhil (The Belfast Philo-Celtic Society) agus athbheochan na Gaeilge sna 1880í | De Brún, Fionntán | Article in Book | | 2025 |
| Craobh eolais : a festschrift for Ruairí Ó hUiginn | | Monograph or Collective Volume | An Sagart | 2025 |
| Expressing the nineteenth century in Irish : the poetry of Aodh Mac Domhnaill (1802-67) | De Brún, Fionntán | Article in Journal | | 2011 |
| Introduction | de Brún, Fionntán | Article in Book | | 2006 |
| Léachtaí Cholm Cille XLIX: Ón nGruagach Gréagach go Myles na gCopaleen: Saol agus Saothar Mhuintir Nualláin | | Monograph or Collective Volume | An Sagart | 2019 |
| Pádraic Mac Piarais, Scoil Éanna agus neamhspleáchas intleachtúil na hÉireann | de Brún, Fionntán | Article in Book | | 2016 |
| Roibeard Mac Ádhaimh, Aodh Mac Domhnaill agus an réimse poiblí. | De Brún, Fionntán | Article in Book | Ollscoil na hÉireann | 2016 |
| Roibeard Mac Ádhamh, Aodh Mac Domhnaill agus an réimse poiblí | de Brún, Fionntán | Article in Book | | 2016 |
| Seosamh Mac Grianna : an mhéin rúin | De Brún, Fionntán | Monograph or Collective Volume | An Clóchomhar | 2002 |
| Temporality and Irish revivalism : past, present and becoming | de Brún, Fionntán | Article in Journal | | 2013 |
| The Fadgies: an 'Irish-speaking colony' in nineteenth-century Belfast | De Brún, Fionntán | Article in Book | | 2006 |