Looking for Relations to Joannis Petri Wier from Prussia Germany

developing a family tree- have joannis petri and katherine hotz - both from prussia germany- they had six children-
andrew- micheal- george- anton john ( my grandfather) , peter.
I am trying to find relatives or any one knowing of these people. they immigrated to stearns, minnesota in 1853 on the ship the "cotton planter. "
bev