I have found that my gggrandfather name was Robert Zeddock Boyd, he was born in MS about 1850 and migrated before 1870 to Texas. I had thought his name was Zeb but have found his son's WWI draft registration card and it indicates Zeddock as the middle name. He is listed in a couple of census records as a junior and everything else fits. The counties in question in Texas are San Jacinto and Liberty counties with Montgomery sometimes.