M, b. 4 January 1860
| Birth* | 4 January 1860 | Denis Mahoney was born on 4 January 1860 at Maniwaki, Comté Gatineau, Québec . |
| Marriage* | 25 June 1900 | He married Clara Morin, daughter of Félix Morin and Stephanie Poulin, on 25 June 1900 at Ste-Philomène, Montcerf, Comté Gatineau, Québec. |
| Census1901* | April 1901 | Denis Mahoney and Clara Morin appeared on the 1901 Census of Lytton Twp, Comté Gatineau, Québec, enumerated April 1901. Their daughter Mary Clara was listed as living with them. |
| Census1911* | 3 June 1911 | Denis Mahoney and Clara Morin appeared on the 1911 Census of Lytton Twp, Comté Gatineau, Québec, enumerated 3 June 1911. Their children Mary Clara, Daniel, Patrick, John, Denis and Thomas were listed as living with them. |
| Note* | circa 1913 | Denis Mahoney and Clara Morin moved from Montcerf to South Porcupine circa 1913.1 |