Would you please check your book for Isenbergs in Madison County. I am looking for: Charles (b. 1821) m. Henretta (b.1826) They had four sons: Charles (b. 1851) m. Mary Aausauer. Frederick (b.1857) Henry (b. ?) August (b. 1863) Charles and Mary had three sons: Louis Charles Emil John The brothers married three Heck sisters. According to the information I have, most of the Isenbergs lived in Collinsville or Troy, Illinois. I would appreciate any information you can give me on these or any other Isenbergs you have in your book. Thank you for helping all of us! Jennifer