Augustin Grignon was a fur trader and general entrepreneur in the Fox River Valley in territorial Wisconsin, surviving into its early years of statehood. He was born in Green Bay on 27 June 1780, the third of nine children of Pierre Grignon, Sr, and Domitelle Langlade Grignon. (His father also has three children in an earlier marriage.) His mother was the daughter of Métis Charles Langlade, widely considered to be the "father of Wisconsin."
He ran his father's store in Green Bay with his brother, Pierre, Jr., from the time of his father's death in 1795 until 1805 when he moved to property his wife inherited near Kaukauna. He continued in general trade, farmed, and built a flourmill and gristmill in 1821. In 1832 he was granted the first private property in Columbia County, at strategic Fort Winnebago. In 1834 he went into semi-retirement, engaging in the fur trade at Butte des Morts. He died 24 October 1860 at Butte des Morts.
- Grignon, Augustin. "Seventy-two years' recollections of Wisconsin." Wisconsin Historical Collections (Madison, Wis.: State Historical Society of Wisconsin, 1857), vol. 3, p. 243 (footnote by Lyman C. Draper). Available on line at "Turning Points in Wisconsin History"..
- Grignon, p. 196 (introductory remarks by Draper).
- Turner, Andrew Jackson The family tree of Columbia County (Portage, Wis.: Press of the Wisconsin State Register, 1904), pp. 67-69.
- "Dictionary of Wisconsin History"..
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