Hi Karin,
Most of the Hehenbergers live in Wisconsin, around Sauk City. There are some in Pennsylvania too. My family settled in Southern Indiana...which is were I am, near the Ohio River. We are not sure how, or why, Michael Hehenberger decided to settle here. He may have known some others in the area or there may have been some other Hehenbergers. There is a large German population here and around Jasper, Indiana. So chances are he may have knew people and settled close. Thanks for asking your family for me and writing a response. I can't tell you how excited I was to get your message. I hope we can keep writing and exchanging information.