The county of Huron is unique, because they had many gaps in recording the Naturalization records in the county. Records are stored in two separate locations. They are the Common Pleas Court and the archives in Bowling Green.
The records at the county level are located at the Common Please court in Norwalk. Dates are sporadic on their coverage. Here are the dates from the archives and they will be the same at the courthouse. Nat Records 1864-1893, Aliens 1903-1905, Declaration of Intent 1859-1905, Minors 1185-1903 and proof of residency 1864-1903 . Be sure to check ahead prior to looking for your records to make sure your relative falls within these dates. Be sure to get copies of the documents or take copious notes.
Searching for these types of records in Huron Co will be a challenge. Have a great day.