Was your Jochim Rohwedder born in 1863? If so, this may be him:
Jochim Hinrich * 1863
s of Johann Friedrich Bernhard Margaretha née Hauschildt. He emigrated in 1868, with his parents,
I would assume, as he was too young to leave on his own.
Information is from here:http://www.rootdigger.de/Emi.htm