Archibald Chaussegros de Léry Macdonald, was the son of Antoine-Eustache Lefebvre de Bellefeuille MacDonald and Marie-Louise de Lotbinière Harwood. He was born in Montreal on 28 June 1862. A Montreal lawyer, business, historian, and collector, he became well known for his historical and genealogical publications. He received a classical education at the Collège Sainte-Marie before studying law at the Université Laval de Montréal. He married Marie-Louise-Dumontine-Augusta Globensky on 24 September 1884. The couple had five children. Macdonald was for some years the law partner of W. D. Lighthall. He acquired the rights to the Seigneurie of Rigaud in 1897. He also served as mayor of Rigaud from 1901 to 1904, and from 1910 et 1913. He died 21 May 1939 at the Hôpital Notre-Dame de Montréal.

Alexander MacDonald was born on October 29, 1863, in Mongenais, Québec. His interest in medicine developed during a recovery from tetanus. He graduated from McGill with a degree in Medicine in 1889. He practiced all his life in Vankleek Hill, Ontario, where he purchased a building and turned it into a hospital. He also donated his time as a physician to nuns and clerics at a local convent. He died on March 1, 1952.