Preuben is Prussia. You may be mistaking a letter that appears to be a capital B but it translates to ss.
Hanover can be either a state or a city. I do not know your grandfathers birthdate but at one time Hanover was known as the Kingdom of Hanover(KOH).
I do not know the years of this reign.
Have you looked other places such as the LDS Family Search webpage? Many times the church is an excellent place to find records but first you will need dates and the exact city of birth. Sometimes the records are kepin the Diocese archives.
Max
---- Cwbtuck@aol.com wrote: