| A Marmion miscellany | Marmion, William F. K. | Monograph or Collective Volume | St Lazarus Press | 2002 |
| Brevet generals of Irish birth in the US civil war | Marmion, William F. K. | Article in Journal | | 1997 |
| Gaelic titles and forms of address a guide in the English language | MacCarthy MórMarmion, William F. K. | Monograph or Collective Volume | Irish Genealogical Foundations | 1990 |
| Generals of Irish birth in the U.S. Civil War : the complete list. | Marmion, William F. K. | Article in Journal | | 2002 |
| Irish Brigade officers of the French army in the American Revolution | Marmion, William F. K. | Article in Journal | | 1998 |
| Irish knighthoods and related subjects : an anthology of published works | Marmion, William F. K. | Monograph or Collective Volume | Irish Genealogical Foundations | 2002 |
| Knights of St John of Jerusalem | Marmion, William F. K. | Article in Journal | | 1999 |
| Marmion descents : being the noble and royal ancestors of the Marmion family of Ireland | Marmion, William F. K. | Monograph or Collective Volume | St. Lazarus press | 2005 |
| Nobiliary titles in the Republic | Marmion, William F. K. | Article in Journal | | 1995 |
| The family name of Marmion | Marmion, William F. K. | Article in Journal | | 1995 |
| The Knights Templar in Ireland | Marmion, William F. K. | Article in Journal | | 1999 |
| The Marmion family in Ireland and in general | Marmion, William F. K. | Monograph or Collective Volume | St. Lazarus press | 1997 |
| The Marmion family of Carlingford to 1660 | Marmion, William F. K. | Article in Journal | | 1998 |
| The minor orders of knighthood. St Thomas of Acre and St Lazarus of Jerusalem | Marmion, William F. K. | Article in Journal | | 1999 |
| Were there any Irish names among the first crusades | Marmion, William F. K. | Article in Journal | | 1999 |