Hi, Gregory--Our Heinrich Junge (great-great grandfather) was born in 1816 in Heim (Ham), near St. Annen, Schleseig-Holstein.His father was Johann Junge.We know only of 2 of Heinrich's brothers--Peter, born 1810, and Hans, born 1821. If any of this sounds good, I'll give you information about our line--that of John Bade Junge (my husband's great grandfather who is parallel to your Hans), son of Heinrich.
I'm wondering if Hans Junge, born 1821, is the father of your Hans Herman.
John Bade and family came directly to Iowa--around Waverly and Ackley.Heinrich had died, and his widow brought the six kids--three boys and three girls over.I'll be glad to give you all the details if you think there's a connection.
Best wishes--Ginger Young (John Bade changed the name to Young but his brothers did not.)