| Title |
Author |
Composition Date |
Publisher |
| An Ornamental Device in Irish Verse | | 1677 | (B.Á.C.: NUI, 1989) |
| Ó Dálaigh Fionn cct. | Ó Caoimh, Eoghan | 1709 | (B.Á.C.: NUI, 1946) |
| O'Davoren Deed | Buíon Údar | 1606 | (Luimneach: North Munster Archaeological Society, 1912) |
| Official Correspondence Relating to the Peace Negotiations, June-September 1921 | De Valera, Eamon | 1921 | Dáil Éireann |
| Óg Á Chaoineadh | Anaithnid | 1807 | (Má Nuad: Cuallacht Chuilm Cille, 1954) |
| Oideas an Leagha don Othar | Anaithnid | 1780 | (Má Nuad: Cuallacht Chuilm Cille, 1953) |
| Oidhche Áirneáil i dTír Chonaill | Enrí Ó Muirgheasa | 1924 | Preas Dhún Dealgan |
| Oidhche ar Bharr Tuinne agus Scéalta Eile | Renascence, aistrithe ag Nioclás Tóibín | 1924 | Cualacht Oideachais na hÉireann |
Oidhe Chloinne Tuireann
(Fate of the Children of Tuireann, The) | Féach bail. / eag. | 1889 | Gill, M. H. and Son |
| Oidhe Chloinne Uisnigh | In eagar ag R. O'Duffy | 1898 | Gill, M. H. and Son (do SPIL) |
| Oighreacht Róisín | Ó Séaghdha, Pádraig | 1910 | Connradh na Gaedhilge |
| Olc mo thuars sonn ó Lundain | | 1626 | (B.Á.C.: Hodges, Figgis & Co. Ltd., 1912-1913) |
| On Father Francis Mac Mahon | Moore, Séamus P. | 1757 | (Muineachán: Cumann Seanchais Chlochair, 1956) |
| On the Qualitees, Maners and Kunnynge of a Surgean | Anaithnid | 1600 | (Halle: Niemeyer Verlag, 1930) |
| Ór-sgeul an Chreidimh | Craig, J. P. | 1911 | Craig, D. G. & Co. |
| Orlando agus Melóra | Anaithnid | 1679 | (B.Á.C.: An Cumann le Béaloideas Éireann, 1946) |
| Órtha ó Chonndae Aontroma | | 1857 | (B.Á.C.: An Cumann le Béaloideas Éireann, 1929) |
| Ovid's 'Remedia Amoris' | Ó Niallainn, Tomás | 1823 | (B.Á.C.: I.A.B., 1984) |
| Ovid, an Macalla agus Cearbhall Ó Dálaigh | | 1603 | (B.Á.C.: NUI, 1982-1983) |
| Title |
Author |
Composition Date |
Publisher |
| An Óige | Ní fios | 1912 | An Claidheamh Soluis |
| An Old Hymn, from the Arran Islands. An Eiséirghe. | Féach bailitheoir | 1894 | Connradh na Gaedhilge |
| O Flandachain laomhdha alámh. | O'Heerin | 1885 | Connradh na Gaedhilge |
| Ó Thír Chonaill | Mac Meanman, Seaghán | 1911 | An Claidheamh Soluis |
| O'Conway's MS. Irish Dictionary. | Lyons, J. J. (Philadelphia) | 1898 | Connradh na Gaedhilge |
| O'Curnan's Song. 'A Mháire mhilis bhreágh.' | Ní fios | 1887 | Connradh na Gaedhilge |
| O'Curnan's Song. 'A Mháire mhilis bhreágh.' | Ní fios | 1887 | Connradh na Gaedhilge |
| O'Donovan's Specimens of King Cormac's "Tegasc Flatha." | Féach aistritheoir | 1883 | Connradh na Gaedhilge |
| O'Flannagan's Englis Notes. | Ní fios | 1883 | Connradh na Gaedhilge |
| Ó'n Domhan Thiar | Ó hÉigeartaigh, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Bás Grover Cleveland | Ó hÉigearta, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Coimhthionóil an Chonnartha i Stát Nuadh Eabhrac | Ó hEigeartaigh, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Coimhthionóil Connartha na Gaedhilge i Sasana Nuadh | Ó hEigeartaigh, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Eascárdas Idir na Stáit agus an Venesuela | Ó hÉigearta, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Gléas Scoláireachta na hIbernians | Pádraig Ó hÉigearta | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Magadh an Phuncáin | Ó hÉigeartaigh, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar - Na Muilne Cadáis | Ó hEigeartaigh, Pádraig | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thiar. | Ó Gramhnaigh, Eoghan - O'Gramhna, Eoghan | 1897 | Connradh na Gaedhilge |
| Ó'n Domhan Thoir - An Gearmánach Thoir | Breathnach, Mícheál | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thoir - An neart agus an ceart | Breathnach, Mícheál | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thoir - Riaghaltas na Sasanach | Breathnach, Mícheál | 1908 | An Claidheamh Soluis |
| Ó'n Domhan Thoir. An Rúise - Ár agus Achrann | Breathnach, Mícheál | 1908 | An Claidheamh Soluis |
| Ó'n Iar i dTuaidh | Ní fios | 1902 | An Claidheamh Soluis |
| Obair an tSamhraidh | Ní fios | 1901 | An Claidheamh Soluis |
| Obair do na Gaedhilgeoiríbh | Nic Ghabhann, Caitlín | 1913 | An Claidheamh Soluis |
| Obair le déanamh 'sa Ghaedhealtacht. | A. de B. | 1916 | The Irishman |
| Obair na Gaedhilge arís | Ní fios | 1914 | An Claidheamh Soluis |
| Oghmóracht. I - Aibghidir an Oghaim. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Óghmóracht. II. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Oghmóracht. III. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Oghmóracht. IV. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Oghmóracht. V. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Oghmóracht. VI. | Mac Néill, Eoin | 1908 | Connradh na Gaedhilge |
| Oghmóracht. VII. | Mac Néill, Eoin | 1909 | Connradh na Gaedhilge |
| Oghmóracht. VIII. | Mac Néill, Eoin | 1909 | Connradh na Gaedhilge |
| Óglaochra na hÉireann | Torna | 1913 | An Claidheamh Soluis |
| Oibreacha na hÉireann | Ní fios | 1904 | An Claidheamh Soluis |
| Oíche Shamhraidh | Údair éagsúla | 1925 | Clólucht an Bhranair Teoranta |
| Óid a sgríobh an Chraoibhín Aoibhinn agus a thug sé uaidh os cómhair an Oireachtais | De hÍde, Dubhghlas | 1899 | An Claidheamh Soluis |
| Óid an Oireachtais, 1908. | Ó Cruadhlaoich, Pádraig | 1908 | Connradh na Gaedhilge |
| Óid d'Fheis na Gaillimhe, 1900 | Ó Mhaoildhia, Seamas | 1900 | An Claidheamh Soluis |
| Óid do'n Oireachtas | An Craoibhín Aoibhinn | 1902 | An Claidheamh Soluis |
| Óid do'n Oireachtas, 1900 | An Craoibhín Aoibhinn | 1900 | An Claidheamh Soluis |
| Óid Do'n Oireachtas, 1901 | An Craoibhín Aoibhinn | 1901 | An Claidheamh Soluis |
| Oideachas agus Gaedhealtacht | An Seabhac | 1911 | An Claidheamh Soluis |
| Oideachas Oireamhnach | Ní fios | 1905 | An Claidheamh Soluis |
| Oideachas san Oileán Úr | Údair éagsúla | 1919 | Muinntir an Bhranair |
| Oideadh an Rábaire. | Féach ainm cleite | 1906 | Connradh na Gaedhilge |
| Oidhe Chloinne Tuireann. The fate of the Children of Tuireann. | O'Duffy, Richard J. | 1889 | Connradh na Gaedhilge |
| Oidhe Chloinne Uisneach. | Ní fios | 1884 | Connradh na Gaedhilge |
| Oidhe Chloinne Uisnigh. (Continued). | Ní fios | 1898 | Connradh na Gaedhilge |
| Oidhe Cloinne Tuireann. | Féach ainm cleite | 1889 | Connradh na Gaedhilge |
| Oidheadh an Chait Ghlais. | Ó Coinnealbháin, Seumus | 1888 | Connradh na Gaedhilge |
| Oidheadh Conbige. | Ní fios | 1899 | Connradh na Gaedhilge |
| Oileáin Chonnamara | Ní fios | 1913 | An Claidheamh Soluis |
| Oileáin Chonnamara (ar leanamhaint) | Breathnach, Tomás / Nic Ghabhann, Cáitlín / Mac Én | 1913 | An Claidheamh Soluis |
| Oileáinín na Féile. | Féach ainm cleite | 1908 | Connradh na Gaedhilge |
| Oileán Dairbhre. | Ó Duibhne, Diarmaid | 1904 | Connradh na Gaedhilge |
| Oireachtas (1901). | Ní fios | 1901 | Connradh na Gaedhilge |
| Oireachtas (1901). | Ní fios | 1901 | Connradh na Gaedhilge |
| Oireachtas 1898. | Ní fios | 1898 | Connradh na Gaedhilge |
| Oireachtas 1898. | Ní fios | 1898 | Connradh na Gaedhilge |
| Oireachtas 1898. | Ní fios | 1898 | Connradh na Gaedhilge |
| Oireachtas 1898. | Ní fios | 1898 | Connradh na Gaedhilge |
| Oireachtas Recitations, 1898. | Ní fios | 1898 | Connradh na Gaedhilge |
| Oireachtas, 1900. | Ní fios | 1900 | Connradh na Gaedhilge |
| Oireachtas, 1900. | Ní fios | 1900 | Connradh na Gaedhilge |
| Oireachtas, 1902. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oireachtas, 1902. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oireachtas, 1902. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oireachtas, 1902. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oireachtas, 1902. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oireachtas, 1902. List of Subscriptions. | Ní fios | 1902 | Connradh na Gaedhilge |
| Oisín i dTír na n-Og. | Ní fios | 1896 | Connradh na Gaedhilge |
| Oisín. | Ní fios | 1902 | Connradh na Gaedhilge |
| Ólachán nó Saoirse - Cia aca? | Ní fios | 1906 | An Claidheamh Soluis |
| Olc agus Éitheach ar Uachtar | An Seabhac | 1914 | An Claidheamh Soluis |
| Olishers agus Gaybricks. | Ua Laoghaire, Peadar | 1897 | Connradh na Gaedhilge |
| Ollamh gan ainm cct ar an REVOLUTION ann san bhfrainc | Aistrithe ag Douglas Hyde | 1895 | Ulster Archaeological Society |
| On do fhobair (hobair) or d'fhobair (d'obair). | Laoide, Seosamh | 1895 | Connradh na Gaedhilge |
| On the division of the year among the ancient Irish. | O Donnabháin, Seaghán | 1883 | Connradh na Gaedhilge |
| On the Irish infinitive. I. | Féach ainm cleite | 1892 | Connradh na Gaedhilge |
| On the Irish infinitive. II. | Féach ainm cleite | 1892 | Connradh na Gaedhilge |
| On the Irish Names of Invertebrate Animals | Scharff, R. F. | 1916 | I. N. J. Committee, Belfast |
| On the Irish Names of Reptiles, Amphibians and Fishes | Scharff, R. F. | 1916 | I. N. J. Committee, Belfast |
| On the Irish of County Monaghan. II. | O Mallaile, Aodh | 1896 | Connradh na Gaedhilge |
| On the study of Irish. IV. The Verbal Noun (Continued). | Mac Néill, Eoin | 1896 | Connradh na Gaedhilge |
| On the study of Irish. V. The Verbal Noun (continued). | Mac Néill, Eoin | 1896 | Connradh na Gaedhilge |
| On the study of Irish. VI. The Verbal Noun (continued). | Mac Néill, Eoin | 1896 | Connradh na Gaedhilge |
| On the verb gabhaim. | Flemming, John - Seághan Pléimion | 1895 | Connradh na Gaedhilge |
| On two Irish construction. | Mac Néill, Eoin | 1897 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1882 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1883 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1883 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1883 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1883 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1883 | Connradh na Gaedhilge |
| Opinions of the Press. | Údair éagsúla | 1884 | Connradh na Gaedhilge |
| Óráid | De Henebre, An tAthair Risieird | 1899 | An Claidheamh Soluis |
| Óráid | Ua Loinsigh, Domhnall | 1899 | An Claidheamh Soluis |
| Óráid a chuig S. S. Ua Dubhghaill uaidh i mBéilfeirsde. | Ua Dubhghaill, S. S. | 1899 | An Claidheamh Soluis |
| Óráid Enrí Uí Mhuirgheasa ag Ath na Páircín | Ó Muirgheasa, Enrí | 1901 | An Claidheamh Soluis |
| Óráid Phádraic Uí Bhirn - II | Ó Birn, Pádraic | 1900 | An Claidheamh Soluis |
| Óráid Phádraic Uí Bhirn os comhair na feise bhí ins na Frasa i dTír Chonaill | Ó Beirn, Pádraic | 1900 | An Claidheamh Soluis |
| Oráid Pheadair Óig Uí Annracháin i Sgibirín | Ó hAnnracháin, Peadar Óg | 1900 | An Claidheamh Soluis |
| Oráid Shéamuis Uí Dhubhghaill ag Céilidhe Dhoire | Ó Dubhghaill, Séamus | 1900 | An Claidheamh Soluis |
| Óráid Thaidhg Uí Ghlasáin os comhair Tionóla na hAondachta i gCorcaigh, Iúl, 1900 | Ó Glasáin, Tadhg | 1900 | An Claidheamh Soluis |
| Óráid, Sgeal Fiannuigheachta (ar lean.) | Údair éagsúla | 1900 | Nolan Bros |
| Oráid. | Mag Fhloinn, Monsignor Toirdhealbhach | 1897 | Connradh na Gaedhilge |
| Órí 'Sé Do Bheatha 'Bhaile!, Scéal, Téarmaíocht | Údair éagsúla | 1923 | by Permission of the Army Authorities |
| Os Cionn na Fairrge | Ní fios | 1906 | An Claidheamh Soluis |
| Our aim in literary usage. | Féach ainm cleite | 1897 | Connradh na Gaedhilge |
| Our Lessons in Irish. | Ní fios | 1894 | Connradh na Gaedhilge |
| Our position. | Flannery, Thomas - Tomas O Flannaoile | 1883 | Connradh na Gaedhilge |
| Out of school. | Ní fios | 1897 | Connradh na Gaedhilge |
