Hello, where would I find naturalization and immigration records for Butler Co.? I'm specifically looking for German immigrants Andreas (Andrew) Koch, wife Maria (Mary), and a son also Andreas (Andrew). The last name eventually became Cook. Andrew, the son, served in the Union Army in the Civil War and settled in Lewis Co., Ky, but I believe the Koch family may be the Andrew and Mary Cook living in Hanover Township of Butler Co., OH in 1850. The ages and names are a match for my family. Working backwards from documents in Lewis Co., KY, I know that Andrew Cook (Koch) was in the 193rd OH Infantry in the Civil War, and from his pension application I know that he worked as a machinist apprentice in Cincinnati, OH in 1854. He was b. in 1835 in Hamburg, Germany. Date of birth documented in several places, birthplace documented from census records. Am I on the right track with the Butler Co. family? Does anyone know where to locate naturalization records for Butler Co.? I have check in Lewis Co. Ky for naturalization records, and none were found. Thank you. Janet Estep