I also have an ancestor, John Nagengast, who came to Pennsylvania in 1870. I have both his Declaration of Intent and his record when he became a citizen. Neither says where he came from other than just Germany. The only way I know he came from Bavaria is that a relative that came about the same time said Bavaria on his. I have the naturalization records for three men and only one even said Bavaria. The records are in the County Courthouse, Prothonotary's Office. There is no waiting period for immigrants to apply for Declaration of Intent to become a US citizen. Before becoming naturalized they must reside in the United States for 5 years, and be a resident of Pennsylvania for at least 1 or those 5 years. I found my ancentors records records in the Crawford Co. Courthouse because that is where they lived for the first 10 years after they came over. Only the men were naturalized then. The wife and children became citizens when the husband and father was naturalized. If by chance you don't know for sure which county they were in when they first came over, you could make an educated guess and try where you think they most likely were. You could also check out the Pa. county site and maybe hire someone to go to the court house and check it out for you. Hope this helps, but even if you get the naturalization records, you may not know anything more. Helen Williams