I don't know whether this will help or not. My grandfather, Joe McPeak, decends from the McPeaks who settled in White County, TN. He is 81 now, but 10 years ago he spent alot of time trying to map out our genealogy. He was able to trace the family history back quite aways and he and my grandmother went to Ireland and then Scotland trying to find out more. He has quite a bit of the history. The reason I think it might help is, he has since told us he descended from three brothers that were from Ireland. They split up and one of them traveled before settling down finally in Tennessee. I don't know any of the dates, Sorry, but I have been able to track down a little information on my own. At the time he was doing all of this, I was in my early 20's with a young son and didn't pay a lot of attention. However, my grandfather's health has deteriorated and a few years ago he asked me to keep looking for more information.
He has recorded a lot of this information and even helped put together a history of White Co., TN, which contains alot of the McPeak history he found. I found a couple of websitesthat talk a little about the family. I'll post them below. If you think you may be related to our branch of the McPeaks, or have anything that would link to our branch, let me know. I can scan and send copies of the information my grandfather has, with his permission of course, that may help you. I hope this helps!