Source: Ancestry.com—Thills From Luxembourg Family Tree; and Wisconsin Marriages, 1820-1907; and Nebraska, State Census collection, 1860-1885.
The 1910 census reported that she immigrated in 1853 and became a naturalized citizen. However she must have immigrated before that time because her first child was born in 1852 in Wisconsin.
In 1900 the census reported that Christina had had 10 children of whom nine were living. In 1910 she lived with her son Antony, his wife Annie, and their adopted daughter Mary in St. Bernard, Platte County, Nebraska.

Source: Ancestry.com—Thills From Luxembourg Family Tree; and Wisconsin, Marriages, 1820-1907.

Source: K-J Tonner’s Kelberg data file; and Ancestry.com—Nebraska, State Census Collection, 1860-1885.
His parents were Mathias Schmitt and Angela Welter.
In 1860 he and his wife Christina lived in Marshfield Township, Fond du Lac County, Wisconsin with their two children and Christina’s three children from her previous marriage.
In 1870 he and his wife and their children lived in Marshfield. The census taker listed all of the children as part of the “Smith” family. Peter “Smith,” a fifty-year-old retired man from Prussia, lived with the family.
In 1885 he and his wife and four of their children—John, Christina, Anthony and Paulina, lived in St. Bernard, Platte County, Nebraska. Theodore Thome and his family lived nearby. Their daughter Eva may have married Killian Ottis and lived close to Johan and Christina’s farm.
In 1900 John and his wife lived with their son Antony in St. Bernard. His wife’s son Theodor Thome lived nearby.