Hi, I realize it's been over 5 years since this post. My husband's grandfather is Henry Allendorf from Marburg,in Hesse-Darmstadt. I'm not sure if this is your Henry (I believe there was another Henry Allendorf who settled in Cincinnati about 50-75 years prior to our Henry), but I'd be happy to share what I have with you. Our earliest documented Allendorf was Johann Heinrich Allendorf, born 1791.