Twenty eight May seventeen hundred and seventy five [28 May 1775] by we, undersigned vicar priest of Quebec, was baptized Alexandre [MacKay] born on this day of the legitimate marriage of Alexander Macaille [MacKay] and Angelique Girouard [error by priest/should read Desmolier] his wife. The godfather was Rene MacDonald and the godmother Marianne Desmolier wife of Joseph Girouard who have signed with us. The father, therefore...

signed: Marianne Desmolier + Rene MacDonald

J. B. Dubois, priest1727
Alexandre lived in Berthier-sur-Mer, Montmagny County, until Alexander William MacKay died circa 1780.
Alexandre and Rose lived in New Carlisle, Quebec, Canada. 1723

“2. Alexandre MacKay , was born/baptized Catholic in the Basilique Notre-Dame de Quebec Church, on 28 May 1775 [15]. Alexander MacKay , at 35 years of age, was married on 30 April 1810, in the Bonaventure Catholic Church [16] to 29 year old Rose LePage , the daughter of Jean-Baptiste-Michel LePage and Rose Arsenault . Alexander MacKay and Rose LePage, along with their children, resided in New Carlisle, Quebec, Canada, on land inherited [17] from his father Alexander MacKay , who had petitioned the Crown in 1778, from Berthier , Quebec, Canada, for a Land Grant [18] in New Carlisle, Quebec, Canada, as a reward for his service to the Crown during the Seven Years War . Unfortunately, Alexander MacKay died before ever having set foot in New Carlisle, Quebec, Canada. was also married a second time on 07 August 1827, to Anne Lane , widow of Hector Morrison , in New Carlisle, Quebec, Canada. There were no children from the union between Alexander MacKay and Anne Lane). Alexander MacKay died when he was 81 years old, on 14 March 1857, [19] and was buried with his first wife Rose LePage in the Bonaventure Catholic Cemetery, Bonaventure, Quebec, Canada.

SOURCES
15. Registre Notre-Dame de Quebec. 1774-1777. Quebec City, Quebec, Canada. Page 186.
16. Registre de St. Bonaventure. 1771-1811. Co. de Bonaventure, Bonaventure, Quebec, Canada. Page 88.
17. Gaspe Land Commission: List of claimants: Index only. Gaspe Land Commissioners were appointed in 1819 to hear and determine all applications for grants of land by persons holding or claiming to hold lands in the Gaspe District. In the Index, we find listed Alexander McKay , on Page 466 in Microfilm Reel C-97, along with his sister Angelique McKay, on Page 466, also listed in Microfilm Reel C-97.
18. Alexander MacKay , in 1778, from Berthier , Quebec, Canada, petitioned the Crown in a Land Grant application by stating the following written words: "I, Alexander MacKay, former Soldier and Sergeant of the 78th Regiment, Clerk-Merchant-Vendor residing in Berthier, Quebec, Canada, do hereby petition the Crown to make a request for a Land Grant in New Carlisle, Quebec, Canada. [Signed on this day]... 1778. [Signed by]: Alexander MacKay". Same as reference source no. 22. [Note: Since he was a former Sergeant, he was entitled to 200 acres of land, which was later inherited by his family].
19. Registre de St. Bonaventure . Co. de Bonaventure, Bonaventure, Quebec, Canada.”1723

She spoke only English. She was the widow of Hector Morrison when she married Alexander McKay.1723