There’s an interactive map on Ancestry.com that can show how your family surname was distributed at three points in American history.
The map for McGehee is interesting to me because, apparently, at one point people in my ancestral line were pretty much the only McGehees in Indiana. I’m not giving anything away there because I already posted last May about my great great grandfather and his two brothers, all from Indiana, who served in the Civil War. In 1840 all three of them would have been in the same Indiana household.
Indiana wasn’t the only non-Confederate state with a recorded McGehee presence, but all of the other states were slave states. If there were any McGehees in Union blue besides my ancestor and his brothers, I’d be very surprised. After the war, my kinsmen had dispersed across the Sunbelt, including to California.
By 1920, of course, we had spread like the flu to all corners of the nation…