According to BAKEMAN, MARY HAWKER. "District Court Naturalization Records - Benton County." In Minnesota Genealogical Journal, no. 8 (1992), pp. 741-744, Casimere first appears in the US in 1850.
Available are the census docs for Minnesota 1857, 1860, 1870, 1880 and 1900 below.
The couples children are
William Galarneault b1854 – Mary Galarneault b1855 – Margeret Galerneault b1856 – 1942
Josephine Galarneault b1858 – Casimere Galarneault b1860 – Devine Galarneault b1862 –
John Galarneault b1864 –