My 3xGrandfather Heinrich Reineck's children born in Germany came from Nierstein am Rhine, Germany between 1847 - 1850. The children included: Johanna, b. 20 Mar 1834; Balthasar, b. 25 Nov. 1837; Barbara, b. 1842; Henry, b. 4 Jul 1844; Gertrude, b. 27 Jun 1847. My 2x Grandfather, Adam was born in Sheboygan County in 11 Jul. 1850. Henry, was a Civil War Veteran that served in the Wisconsin Regiment 1862/1865. Where might I locate any Naturalization Records for these children or their father Heinrich? Any suggestions appreciated.