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I descend from Adam Heintz (possibly the Jr. you allude to). Adam Heintz b. 8/7/1812 in Germany. He married Mary Ann Siefert (b. 4/12/1815, Germany). Adam d. 10/30/1878 in Columbus, Franklin Co., Ohio. Mary d. 3/23/1888 in Columbus, Franklin Co., Ohio. They had 6 children, Adam, Mary, Valentine, William, Jacob and Peter. Does this match with your Adam Heintz, Jr? If so, I would be interested in sharing family information.