Are you looking for the Icko Iben b Jan 21, 1900 that married a Kathryn? Lived in Illinois? He was an astronomer? I don't know much but can put you in touch with grandson of godchild of Icko. The grandson Philipp has been helping me with my own family tree-surname Bentzien. Icko Iben was the godfather to his grandmother, also a Bentzien. Philipp and Grandmama live in Germany. Will do what I can to help!
Vicki Bentzien