I am a Walker and have done some extensive research; however, the farther back you go the more ambigious the history. Going back to my grandparents names; Livingstone, Clark, Moffett, Morton, Alan, and of course Walker. Of these names three are recognized Septs of MacGregor. Walker is also a recognized sept of Clan MacMillan. My Great-great-grandfather was Dr. Livingstone. I have a Great-something-Grandfather Moffett that was an Officer in a Highland Regiment and given land in Ireland from William and Mary. But going back over 300 years and all is lost or unreliable. So then I thought, him let us go for the best looking (in my opinion because that is the most important) Tartan, eh? That is more traditional than any other means of choosing a tartan.
So cheers my fellow Walker--a common name if there ever was one, but an uncommon fellowship of descendents of Scotland blood.