Giese/Brandt

I am looking for info on my ggg grandparents Wilhelmena(Minnie) Brandt who married Fredrich Christian D Giese. The info I need mostly is on the Brandt's. The only info I have is that she was born in Germany Feb 19, 1838 or '37. she died Sep 18, 1897 and buried in Swift County, MN. I have no parents names or any siblings. Fredrich was born Aug 4, 1837 in Brandenburg, Germany. Not sure of his death. I have been given Feb 26 (1923 or 1932)?? he also is buried in Swift County, MN - Moyer Township. They had 8 children: Herman Fredrick(my gg grandfather), Gustav,Julius,Otto,Marie Elizabeth,Anna, and Emma. If anyone is related and have any info I would greatly appreciate anything to can add. Please you can e-mail me directly also @ [email protected] Thank-you!