|Senator for Rigaud, Quebec|
|Appointed by||Alexander Mackenzie|
|Preceded by||Charles Wilson|
|Succeeded by||Arthur Boyer|
October 1, 1837|
Cap-Santé, Lower Canada
|Died||June 16, 1909(aged 71)|
|Relations||Isidore Thibaudeau, brother
Alfred Thibaudeau, nephew
He was born at Cap-Santé, Lower Canada in 1837. Thibaudeau operated the Montreal branch of his older brother Isidore's company until 1895. In 1890, he was named sheriff for the city of Montreal. He was also president of the electric company and vice-president of the telephone company.
His nephew Alfred Thibaudeau also served in the Canadian senate.
Joseph Rosaire Thibaudeau married December 9, 1873, Marguerite La Mothe, daughter of Guillaume La Mothe, former Postmaster of Montreal, and his wife, Marguerite de Savoye. Marguerite Thibaudeau was born at Montreal, Quebec March 6, 1853 and educated in Montreal. She served as the President of the Notre Dame Hospital and was instrumental in raising over $50,000 for the institution. She volunteered with the National Council of Women, the Women's Historical Society, the Parks and Playgrounds Association of Montreal. She was a founder of the Ladies' Branch of the Numismatic and Antiquarian Society. The couple lived at 837 Lagauchettire Street, Montreal. The couple had two daughters, the eldest of whom is married to Aime, son of Hon. C. A. Geoffrion, K.C., P.C. Miss Juliette La Mothe, a sister of Madame Thibaudeau, was married, in January, 1888, to the Marquis Charles de Bouthillier-Chavigny.
- Joseph-Rosaire Thibaudeau – Parliament of Canada biography
- Le panthéon canadien : choix de biographies, M Bibaud (1891)
- Vallières, Marc (1990). "Isidore Thibaudeau". Dictionary of Canadian Biography Online. Retrieved 2009-10-09.
- Rens, Jean-Guy, L'empire invisible, Histoire des télécommunications au Canada de 1846 à 1956, volume 1, Presses de l'Université du Québec (PUQ), 1993, 572 pages. Cf. p. 115.
- Morgan, Henry James Types of Canadian women and of women who are or have been connected with Canada : (Toronto, 1903) 
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