| A bibliography of Celtic-Latin literature 400-1200 | Lapidge, MichaelSharpe, Richard | Monograph or Collective Volume | Royal Irish Academy | 1985 |
| À la "Belle Époque" du celtisme : le théâtre populaire et l'oeuvre en prose de J.M. Synge. Ses analogies avec l'oeuvre critique et romanesque d'Anatole Le Braz | Bariou, Michel | Article in Book | | 1994 |
| A newly-discovered Irish and Breton Computistica in Città del Vaticano, BAV, MS Reg. Lat. 123 | Bisagni, Jacopo | Article in Journal | | 2017 |
| Alfred's contemporaries : Irish, Welsh, Scots and Breton | Davies, Wendy, 1942- | Article in Book | | 2003 |
| Aloysius O’Kelly in Brittany | Campbell, Julian | Article in Journal | | 1996 |
| Aspects of the Breton transmission of the Hibernensis | Flechner, Roy | Article in Journal | | 2005 |
| Breizh. The Breton place-names of Brittany and their links with other Celtic countries | Le Moing, Jean-Yves | Article in Book | | 2012 |
| Breton | Press, Ian | Article in Book | | 2010 |
| Celtic sunrise : an outline of Celtic Christianity | Leatham, Diana | Monograph or Collective Volume | Hodder and Stoughton | 1951 |
| Charter-writing and its uses in early medieval Celtic societies | Davies, Wendy, 1942- | Article in Book | | 1998 |
| Christianity in Celtic lands : a history of the churches of the Celts, their origin, their development, influence, and mutual relations | Gougaud, LouisJoynt, MaudPicard, Jean-Michel | Monograph or Collective Volume | Four Courts | 1992 |
| Contributions to a study of the voyages of Saint Brendan and Saint Malo | Mac Mathúna, Séamus | Article in Book | | 1994 |
| Contributions to a study of the voyages of St Brendan and St Malo | Mac Mathúna, Séamus | Article in Book | | 2000 |
| Die Kelten im Mittelalter | Richter, Michael, 1943-2011 | Article in Journal | | 1988 |
| Documents concerning the Irish in France (1607-41) and the Irish college at Rouen (1624-31) | Ó Ciosáin, Éamon | Article in Journal | | 2020 |
| Early Breton voyages to Canada | Evans, Claude | Article in Book | | 1989 |
| Échos de l'art irlandais dans le renouveau des arts en Bretagne, 1900-1940 | Delouche, Denise | Article in Book | | 1994 |
| Edward Lhwyd (c.1660-1709) : Folklorist | Roberts, Brynley F. | Article in Journal | | 2009 |
| Fingar / Gwinear / Guigner : an "Irish" saint in medieval Cornwall and Brittany | Jankulak, Karen, 1964- | Article in Book | | 2001 |
| From Carnac to Callanish : the prehistoric stone rows and avenues of Britain, Ireland and Brittany | Burl, Aubrey | Monograph or Collective Volume | Yale University Press | 1993 |
| Gallican legends about miraculous sea-voyages in stone boats : some Irish and Breton parallels | Alonze, Fernando | Article in Journal | | 1992 |
| Gavrinis and Newgrange - two connected passage graves | Harbison, Peter | Article in Journal | | 2017 |
| Géomorphologie et linguistique: l'expression du relief du sol en langue bretonne | Flatrès, Pierre | Article in Book | | 1982 |
| Holding court : judicial presidency in Brittany, Wales and northern Iberia in the early middle ages | Davies, Wendy | Article in Book | | 2011 |
| Ireland and northern France, AD 600-850 | | Monograph or Collective Volume | Four Courts | 1991 |
| Ireland, Britanny and Tours : the case of Cambridge Corpus Christi College, ms. 279 | Simpson, Helen | Article in Book | | 1994 |
| Ireland, Brittany and England : transmission and use of the "Collectio Canonum hibernensis" | Dumville, David N. | Article in Book | | 1994 |
| Irish artists in Brittany, 1860-1914 | Campbell, Julian | Article in Book | | 1994 |
| Irish saints in Brittany : myth or reality? | Le Duc, Gwenaël | Article in Book | | 2001 |
| La Bretagne, intermédiaire entre l'Aquitaine et l'Irlande | Le Duc, Gwenaël | Article in Book | | 1995 |
| La France et l'Irlande pendant le règne de Louis XIV | Meyer, Jean | Article in Book | | 1994 |
| La grande vierge des Celtes d'Irlande en Petite Bretagne | Duval, M. | Article in Book | | 1977 |
| La perception de l'Irlande dans les "Vitae" des saints bretons du haut moyen âge (VIIe-XIIe siècles) | Merdrignac, Bernard | Article in Book | | 1994 |
| La vraie-fausse neutralité irlandaise pendant la seconde guerre mondiale | Guiffan, Jean | Article in Book | | 2002 |
| Language, culture and identity in Brittany: the sociolinguistics of Breton | Timm, Lenora A. | Article in Book | | 2010 |
| Le culte de saint Colomban en Bretagne | Le Goff, Abbé J. | Article in Book | | 1951 |
| Les influences irlandaises sur l'architecture religieuse bretonne du haut moyen âge à l'époque romane : mythe ou réalité? | Guigon, Philippe | Article in Book | | 1994 |
| Les Irlandais en Bretagne 1603-1780 : "invasion", accueil, intégration | Ó Ciosáin, Éamon | Article in Book | | 1994 |
| Les origines irlandaises de Saint Briac honoré en Bretagne : Légende ou réalité | Bourgès, André-Yves | Article in Book | | 2001 |
| Les relations maritimes et commerciales entre la Bretagne et l'Irlande aux temps modernes (XVe-XVIIIe siècles) : complémentarité ou concurrence? | Lespagnol, André | Article in Book | | 1994 |
| Les vies de saints bretons les plus anciennes dans leurs rapports avec les Iles brittaniques | Kerlouégan, François | Article in Book | | 1981 |
| Libelli et commentarii aliorum : the Hibernensis and the Breton bishops | Flechner, Roy | Article in Book | | 2008 |
| Literacy in medieval Celtic societies | | Monograph or Collective Volume | Cambridge University Press | 1998 |
| Logainmneacha / Placenames. | | Monograph or Collective Volume | | 2012 |
| Major General Oliver Harty in Brittany 1799-1800 | Van Brock, F. W. | Article in Journal | | 1981 |
| Mallow's twins, Treguier and Tinley Park | McNally, Pat | Article in Journal | | 2011 |
| Models of memorialization : Cornwall, Ireland and Brittany compared | Cockerham, Paul | Article in Journal | | 2001 |
| Modern Celtic nationalism in the period of the Great War : establishing transnational connections | Stover, Justin Dolan | Article in Journal | | 2012 |
| Notes and documents. Some new thoughts about St Patrick | McCormack, Jim | Article in Journal | | 2014 |
| Perspectives on Celtic church history | McNeill, J. T. | Article in Book | | 1974 |
| Postcards from Brittany : Walter Osborne's wallet of photographs | Campbell, Julian | Article in Journal | | 2000 |
| Publishing and reading in the Celtic languages, 1700-1900 : an overview | Ó Ciosáin, Niall | Article in Journal | | 2013 |
| Rencontres culturelles entre Irlandais et Bretons aux IXe-Xe siècles : le témoignage des gloses | Lambert, Pierre-Yves | Article in Book | | 1994 |
| Saint Rónán of Brittany, a path of penitence recalled | Ní Mheara, R. | Article in Journal | | 2004 |
| Sport in the making of Celtic cultures | Jarvie, Grant | Article in Book | | 1999 |
| The "Justiciarship" in Brittany and Ireland under Henry II | Everard, Judith | Article in Journal | | 1998 |
| The art of Gavrinis presented in its armorical context and in comparison with Ireland | Le Roux, Charles-Tanguy | Article in Journal | | 1992 |
| The Book of Kells and two Breton gospel books | O'Reilly, Jennifer | Article in Book | | 1994 |
| The Breton migration: a new synthesis | Guy, Ben | Article in Journal | | 2014 |
| The Celtic connection today | Price, Glanville | Article in Book | | 1992 |
| The ceremony at Tenneville on 8 September 2019 commemorating Matthias Barnewall, Lord Trimleston|Appendix. Margery Barnewall and the dogs of Saint-Malo | Robertson, StephanieÓ hAnnracháin, Eoghan | Article in Journal | | 2020 |
| The colonisation of Britanny from Britain : new approaches and questions | Le Duc, Gwenaël | Article in Book | | 1999 |
| The form and function of ritual dialogue in the marriage traditions of Celtic-language cultures | Martin, Neill | Monograph or Collective Volume | Edwin Mellen Press | 2007 |
| The hand-bells of the early western church | Bourke, Cormac | Article in Book | | 1994 |
| The Latin charter-tradition in western Britain, Brittany and Ireland in the early mediaeval period | Davies, Wendy, 1942- | Article in Book | Cambridge University Press | 1982 |
| The man who never slept. (MLSIT 4082). A survey of the redactions and their relation to the 'Lai de Tydorel' | Hilliers, Barbara | Article in Journal | | 1991 |
| The maritime links | Ireland, John de Courcy, 1911-2006 | Article in Book | | 1994 |
| The renaissance and the late medieval lordship of Tír Chonaill 1461-1555 | Mac Eiteagáin, Darren | Article in Book | | 1995 |
| The story and cult of Saint Effiam : an old Irish saint in French Brittany | Pauly, Marie-Hélène | Article in Journal | | 1939 |
| Thomas Hovenden (1840-95) : a Cork artist in Brittany and America | Campbell, Julian | Article in Book | | 1987 |
| Time and tide. An overview of early medieval tide-mills in Ireland, Britain and Europe | Rynne, Colin | Article in Journal | | 2023 |
| Towards an interpretation of the so-called 'Canones Wallici' | Bieler, Ludwig | Article in Book | | 1961 |
| Two letters in Irish from Domhnall Mac Suibhne OSA in Nantes (1640) [with index] | O'Scea, CiaranÓ Ciosáin, ÉamonÓ Macháin, Pádraig | Article in Journal | | 2015 |
| Une course en char dans l'hagiographie bretonne? Saint Samson contre la Theomacha | Merdrignac, Bernard | Article in Book | | 2001 |