| 'Contes Irlandais' | Hennig, John | Article in Journal | | 1947 |
| A bibliographical note on the Schottenkloster of St James, Ratisbon | Hennig, John | Article in Journal | | 1950 |
| A note on Dopping's form of recantation | Hennig, John | Article in Journal | | 1965 |
| A note on Ireland's place in the literary traditions of Saint Brendan | Hennig, John | Article in Journal | | 1952 |
| A note on the Calendar of Cashel | Hennig, John | Article in Journal | | 1952 |
| A note on the traditions of St Frediano and St Silas of Lucca | Hennig, John | Article in Journal | | 1951 |
| A travel book on Germany published in Ireland | Hennig, John | Article in Journal | | 1951 |
| An Irish prophecy of our times | Hennig, John | Article in Journal | | 1945 |
| Appellations of saints in early Irish martyrologies | Hennig, John | Article in Journal | | 1957 |
| Augustine Gibbon de Burgo : a study in early Irish reaction to Luther | Hennig, John | Article in Journal | | 1947 |
| Books on Ireland published in Belgium, 1930-1950 | Hennig, John | Article in Journal | | 1952 |
| Britain's place in the early Irish martyrologies | Hennig, John | Article in Journal | | 1957 |
| Cardinal Newman's brother in Ireland | Hennig, John | Article in Journal | | 1947 |
| Cataldus Racha, a study in the early history of diocesan episcopacy in Ireland | Hennig, John | Article in Journal | | 1946 |
| Continental opinion | Hennig, John | Article in Book | | 1949 |
| Dickens and Ireland | Hennig, John | Article in Journal | | 1947 |
| Die kulturgeschichtliche Bedeutung der Stellung Irlands in der hagiographischen Tradition : Rückblick und Ausblick | Hennig, John | Article in Journal | | 1979 |
| England's contribution to the history of the calendar | Hennig, John | Article in Journal | | 1954 |
| English litanies of the early 18th century | Hennig, John | Article in Journal | | 1955 |
| Feasts of the Blessed Virgin in the ancient Irish church | Hennig, John | Article in Journal | | 1954 |
| Fortunatus in Ireland | Hennig, John | Article in Journal | | 1950 |
| Goethe and Lord Bristol, bishop of Derry | Hennig, John | Article in Journal | | 1947 |
| Goethe's friendship with Anthony O'Hara | Hennig, John | Article in Journal | | 1944 |
| Goethe's personal relations with Ireland | Hennig, John | Article in Journal | | 1943 |
| Grundzüge der Martyrologischen Tradition Irlands | Hennig, John | Article in Journal | | 1972 |
| Ireland's contribution to the devotion to Old Testament saints | Hennig, John | Article in Journal | | 1965 |
| Ireland's contribution to the martyrological tradition of the popes | Hennig, John | Article in Journal | | 1972 |
| Ireland's place in the chivalresque literature of medieval Germany | Hennig, John | Article in Journal | | 1950 |
| Ireland's place in the history of the martyrology | Hennig, John | Article in Journal | | 1979 |
| Ireland's place in the tradition of the 'Martyrologium Romanum' | Hennig, John | Article in Journal | | 1967 |
| Ireland's place in the tradition of the Cistercian menology | Hennig, John | Article in Journal | | 1961 |
| Ireland's spiritual empire : church dedications in Australia | Hennig, John | Article in Journal | | 1944 |
| Irische Einflüsse auf die frühen Kalendarien von St. Gallen | Hennig, John | Article in Journal | | 1954 |
| Irish cosmography 130 years ago | Hennig, John | Article in Journal | | 1947 |
| Irish influences in the folkloristic tradition of St Gertrude | Hennig, John | Article in Journal | | 1942 |
| Irish literature on the continent | Hennig, John | Article in Journal | | 1943 |
| Irish monastic activities in eastern Europe | Hennig, John | Article in Journal | | 1945 |
| Irish Saints in early German literature | Hennig, John | Article in Journal | | 1947 |
| Irish saints in the liturgical and artistic tradition of central Europe | Hennig, John | Article in Journal | | 1943 |
| Irish saints in the Martiloge in Englyssche, 1526 | Hennig, John | Article in Journal | | 1958 |
| Irishmen in America | Hennig, John | Article in Journal | | 1944 |
| Irland und das Friderizianische Preussen | Hennig, John | Article in Journal | | 1966 |
| Irlandkunde in der festländischen Tradition irischer Heiliger | Hennig, John | Article in Book | | 1982 |
| Mediaeval Ireland : saints and martyrologies : selected studies. | Hennig, JohnRichter, Michael, 1943-2011 | Monograph or Collective Volume | Vaviorum | 1989 |
| Medieval Ireland in Cistercian records | Hennig, John | Article in Journal | | 1950 |
| Medieval Ireland, saints and martyrologies : selected studies | Hennig, JohnRichter, Michael, 1943-2011 | Monograph or Collective Volume | [s.n.] | 1989 |
| Michael Whitty | Hennig, John | Article in Journal | | 1947 |
| Notes on early representations of Irishmen in German books | Hennig, John | Article in Journal | | 1950 |
| Old Ireland and her liturgy | Hennig, John | Article in Book | | 1965 |
| Recent Dutch publications relating to Ireland | Hennig, John | Article in Journal | | 1948 |
| Review of L. Bieler, 'The life and legend of St Patrick', 1949 | Hennig, John | Article in Journal | | 1950 |
| Robert Emmet's military studies | Hennig, John | Article in Journal | | 1951 |
| Sacramentaries of the old Irish church | Hennig, John | Article in Journal | | 1961 |
| Some early German accounts of Schomberg's Irish campaign. | Hennig, John | Article in Journal | | 1948 |
| St Albert, patron of Cashel : a study in the history of diocesan episcopacy in Ireland | Hennig, John | Article in Journal | | 1945 |
| St Columbanus in the liturgy | Hennig, John | Article in Journal | | 1943 |
| St Leonard in Ireland | Hennig, John | Article in Journal | | 1945 |
| Studien zur Geschichte der deutschsprachigen Irlandkunde bis zum Ende des achtzehnten Jahrhunderts | Hennig, John | Article in Journal | | 1961 |
| Studies in the Latin texts of the Martyrology of Tallaght, of Féilire Oengusso and of Féilire Húi Gormain | Hennig, John | Article in Journal | | 1970 |
| Studies of the liturgy of the early Irish church | Hennig, John | Article in Journal | | 1951 |
| The Anglican Church in Ireland : prayers against Irish 'rebels' | Hennig, John | Article in Journal | | 1944 |
| The brothers Grimm and T. C. Croker | Hennig, John | Article in Journal | | 1946 |
| The feast of the Assumption in the early Irish church | Hennig, John | Article in Journal | | 1951 |
| The first liturgical catechism in Ireland | Hennig, John | Article in Journal | | 1949 |
| The function of the martyrology of Tallaght | Hennig, John | Article in Journal | | 1964 |
| The historical work of Louis Gougaud | Hennig, John | Article in Journal | | 1942 |
| The Irish background of St. Fursey | Hennig, John | Article in Journal | | 1952 |
| The Irish monastic tradition in eastern Europe | Hennig, John | Article in Journal | | 1943 |
| The Irish monastic tradition on the Continent | Hennig, John | Article in Journal | | 1957 |
| The literary tradition of Moses in Ireland | Hennig, John | Article in Journal | | 1949 |
| The liturgical veneration of Irish saints in Switzerland | Hennig, John | Article in Journal | | 1957 |
| The meaning of 'all the saints' | Hennig, John | Article in Journal | | 1948 |
| The notes on non-Irish saints in the manuscripts of Félire O engusso | Hennig, John | Article in Journal | | 1975 |
| The place of Irish saints in late mediaeval English hagiography | Hennig, John | Article in Journal | | 1954 |
| The place of Irish saints in medieval English calendars | Hennig, John | Article in Journal | | 1954 |
| The place of the archdiocese of Dublin in the hagiographical tradition of the continent | Hennig, John | Article in Journal | | 1955 |
| The place of the Fathers in early Irish devotional literature | Hennig, John | Article in Journal | | 1955 |
| The sources of the martyrological tradition of non-Irish saints in medieval Ireland | Hennig, John | Article in Journal | | 1972 |
| Thomas Moore as theologian | Hennig, John | Article in Journal | | 1947 |
| Ulster place-names in the continental tradition of St Patrick and other Irish saints | Hennig, John | Article in Journal | | 1962 |
| With Irish saints along the Alps | Hennig, John | Article in Journal | | 1955 |