Well, I wish I could help you but I have really not found any information on my gggrandfather, Christopher Vahldieck. He evidently settled in Illinois in 1851 and was from Prussia, but I have no evidence of any other family members. He came with his wife, the fomer Louisa Bresenmeister after serving in the German army for 10 years before leaving. I am suspecting that there have to be some that came to the US with him. There is a large contigent of the name Vahldieck and Vahldick listed still in Germany and perhaps you can find something there. I have done no genealogical searches there yet, but that is still on the list. Where did your Mary settle in 1846? Perhaps I can help you find some other info.