I just found this information out after looking for so long. Not sure why none of the Denker family show up in any of the Ancestry searches. You can imagine how happy I am to see this. How do you know this information/ where did you find it? Are you related?
My father in-law was the great great grandson of John Frederick Denker, through his mothers side; his grandmother's maiden name was Denker. I'd love to share/compare info. with you.