I have Pierre (Peter) and Marie Alleman in Sauk County.
Peter b: 12 Nov 1810 Switzerland d: 20 Oct 1892 Lincoln Twp, Polk County, Iowa.
Marie b: Abt. 1814 Switzerland d: 1862-1870 Sauk City, Sauk, Wisconsin, USA
They were married in 1830 in Switzerland.
It appears that he moved to Iowa between 1862 and 1880 since Marie died between 1862-1870, and he is listed as living in Des Moines in 1880 with his daughters Carrie and Barbara.