Pommerensdorf

Am seeking date of marriage and all childrens details of Johann Hinrich Barnstorf * 28.12.1853 Blumenthal and Olga Michaelis *12.10.1850 of Pommerensdorf. Have Gerhard Barnstorf *17.02.1896 and Johanne Barnstorf * 12.02.1893 born in Geestemunde? I belive there may be later children.Thanks........ James Degen