I am looking for information on George David Kellerman, b. 1791, Prussia, and can't find immigration records. His short obituary says he was an officer (??) in the 'regular German army'. He married Nancy Wilkerson in Logan Co. OH around 1830 and lived in Elkhart Co. IN, Kendall Co. IL, and Pettis Co. MO, where he died in 1885. I have children's names (William, John, Phillip, Susan, Belle, and Frances) and want to find parents of George David Kellerman. Can anyone help?