From census records, are you guessing Given died after 1910 and before 1920? The State Historical Society has all the existing issues of the Woodward newspaper, if they were still in Woodward at the time of his death, but I think a lot of issues prior to 1920 are missing :-(

Have you seen this WPA cemetery record: http://iowawpagraves.org/view.php?id=390356 Do you think maybe that could be Jennie? Right middle initial, probably right birth year... not *too* far from their other locations.