They are probably related, but I don't know how. Your file has some similar names and both families did come to Monroe Co. MI. Carl came to the US in 1874. I don't know if his parents did or not. I don't have a Mona in my file. My Carl's parents were Heinrich Christoph Jockim Rambow and Elizabeth Katherine Fredericka Moller. His siblings were Dorothea, Elizabeth, Wilhelmina, Heinrich, Johanna and Wilhelm. I will save your address and keep an eye out for your Johann. I hope you will do the same for me. Feel free to write me directly anytime.