If you have information regarding the death of an alumni, faculty or staff member, please email Paul Scott at pjscott51@flaget.org or Mark McWhorter at mmcwhorter@iglou.com.
| Last Name | First Name | Class/Role | Date of Death |
|---|---|---|---|
| Demling | Anthony Joseph | 1953 | January 11, 1990 |
| Demling | Cornelius John | 1954 | October 30, 2018 |
| DeMuth | David M. | 1957 | March 4, 2017 |
| DeMuth | Paul E. | 1952 | May 18, 2001 |
| DeMuth | Thomas Anthony | 1954 | September 22, 2012 |
| Denning | Phillip R. | 1952 | |
| Dennis | Dennis E. | 1951 | October 12, 2025 |
| Densford | Theodore | 1949 | |
| Dentinger | Rev. Roy E. | Priest | June 22, 2015 |
| Dentinger | Rev. Vincent P. | Priest | August 7, 2007 |
| Denton | Thomas Edward | 1973 | March 28, 2019 |
| Denton | William Joseph | 1961 | August 18, 2023 |
| Deppen | Edward A. | 1951 | |
| DeSensi | Joseph Anthony | 1964 | June 30, 2018 |
| Desmond | Joseph Patrick | 1946 | January 11, 2024 |
| Dettlinger | Chester A. | 1953 | November 18, 2010 |
| Dettlinger | Ronald Edward | 1954 | January 31, 2024 |
| Dettlinger | Ronald E | 1954 | February 1, 2024 |
| Devine | Thomas J. | 1960 | |
| Devoe, C.F.X. | Br. John J. | Brother | |
| DeWalt | Douglas H. | 1971 | |
| DeWees Jr. | William L. | 1961 | April 15, 2015 |
| Diamond | Rev. Matthew J. | Priest | |
| Dicello | John A. | 1968 | September 28, 2001 |
| Dicello | Robert A. | 1966 | January 7, 1993 |
| Dicken | James H. | Brother | |
| Diebold | Dr. Donald G. | 1948 | October 29, 2000 |
| Diebold | Ernest C. | 1956 | November 3, 2024 |
| Dienes | Robert J. | 1956 | June 1, 1964 |
| Dierken | David W. | 1956 | |
| Diersen | Rev. William M. | Priest | |
| Dieruf | Charles R. | 1949 | December 12, 2006 |
| Dieruf | Edward H. | 1945 | |
| Dillman | Leo B. | 1950 | October 17, 2002 |
| Dinwiddie | John D. | 1955 | April 18, 1975 |
| Dittmeier | Raymond Donald | 1947 | July 2, 2002 |
| Doebler | Richard A. | 1953 | November 14, 2018 |
| Donahue | James F. | 1952 | |
| Donhue, C.F.X. | Br. Peter J. | Brother | July 25, 2016 |
| Donlon | H. Dennis | 1967 | May 1, 2019 |
| Donnelly | Patrick M. | 1952 | October 14, 2010 |
| Donnelly | Thomas J | Lay Faculty | February 20, 2026 |
| Donohue | Rev. Thomas E. | Priest | April 29, 2007 |
| Dooley | Michael | 1961 | August 6, 2019 |
| Dooling | Arthur J. | Brother | |
| Doran | Patrice J. | 1958 | |
| Doran | Richard W. | 1958 | |
| Dorsey | Dwight R. | 1969 | July 23, 2011 |
| Dossett | Homer E. | 1946 | March 6, 2004 |
| Dougherty | Dr. Jude P. | 1948 |