| Family Name |
Source of Relationship |
| Davenport |
Related through the family of my great aunt Mary (nee O'Brien) Murphy. |
| DeCantillon |
Related through a DNA connection probably to my Co. Cork Keefe/O'Keefe and/or Murphy/Vale families. |
| Denz |
Descendants from the Downie family apparently related through DNA matches to my McCabe family. |
| Devlin |
Related through the families of my DNA cousin, Ronan Finnegan. |
| Donahue/Donohue |
Donahue/Donohue families related to me, with one from Co. Monaghan and one from Co. Cork. |
| Donovan |
Related to me through my DNA connections to Deborah Wall McCourt & her daughter, Laura McCourt. |
| Doucette |
Doucette families related to me through DNA connections. |
| Downie |
Apparently related through DNA matches to my McCabe family. |
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| Duffy |
Related through descendants with DNA matches to me and to other members of my extended family. |
| Dungee |
Related through my great aunt Bessie (nee McCabe) Maloney, of James and Catherine (nee Morrissey) McCabe. |
| Dunne |
Related through my 2nd cousin, twice removed, Esther (nee McCabe) Dunne, of Francis and Margaret (nee Morgan) McCabe. |
| Dutton |
Related through my great aunt Agnes (nee McCabe) Dutton, of James and Catherine (nee Morrissey) McCabe. |