You probably know by now that there are hundreds of Smiddy's, if you've read the posted messages, and Betty Smiddy is the expert on that name, so she can answer your question better then anyone else most likely.
Our family of Smiddys first came to light in Jellico or Campbell(I think) County, Tn. With my unusual name, and as a military wife, I had the habbit of opening a phone book 1st. thing, everywhere we moved. When we arrived in Augusta, Ga, I opened the book and was stunned to find an actual Smiddy living right here in Augusta! After contacting this person, and going over for a visit, he gave me his mother's phone number, which I immediately gave to my sister as she lived closer then me, and she took it from there. It was like the flood gates opening!
I wish you great success in your quest. Ann Smiddy Parker