Hi, I know this post is twenty years old, but I'll give it a shot.
My 3x great-grandmother was a Naomi McArdle, from Vermilion County. She had a son by Wilson Jenkins. I believe she may be the "Naoma" mentioned in John McArdle's will, since John McArdle was living next to a Jenkins family with a son William in 1860. It's a guess, but the coincidence is striking to me. If you see this, let me know what you think.