I have no knowledge of your Archibald Sneed, but the name "Archibald" rings a bell. Archibald is an unusual name, and we can go back to an Archibald Snead/Sneed b.1730/40, who m. (1)in 1756 Sarah Holman and (2)in 1780 Sally Pope. This family is discussed in the book, "The Sneads of Fluvanna", and some of the lines are carried down for several generations. I think that the appearance of a name like Alexander could hardly be an accident. Archibald spelled his name with the double e, but all of his children reverted to the ea spelling. My Sneed line, from Benjamin, tutor of Thomas Jefferson,uses the double e.