I am not sure if the Engler(t)s I am looking for would have been in Iowa yet or in Germany. My paternal great-great grandmother was Elizabeth Kunkel, married to Bernard Kunkel. She had been married before to a Schuszler. Her maiden name, however, was Englert--daughter of Balthasar Englert and Eva Schrawz. Bernard Kunkel was born (and died?) in Rothenbach, Bavaria as was Elizabeth Englert. However, their sons, Gabriel, Killian, Martin and Balthasar all moved to Iowa. I don't know if Elizabeth's family also moved there but this may be a connection with your Iowan Engler family.