I have some bits and pieces of information that may help. I found a Gerhard Ennen born Mar 12, 1851 place unknown who died Aug 18, 1895 in Iroquois County. He is buried in the Lutheran Cemetery in Buckley Illinois. Also found a marriage record of George Ennen who married Anna H. Onken on Feb 6, 1884 in Iroquois County.
Alice Ennen was a daughter of Theodore and Bertha Ennen. Henry Ennen was Theodore's brother. They are two of Andreas Janssen Ennen's sons. Andreas and Theda Ennen came to the United States from Wirdum, East Friesia, Germany in 1892. This is my line. I believe they ended up in Buckley Illinois because they joined a relative or family there, but I don't have any information that confirms that.
Hope this helps.