It's nice to hear from you.I knew there were Fallins up in Oregon, because I ran across an Internet reference to another Jack Fallin living in Depoe Bay.
If you read through the messages on this board, I think you'll see that most of the Fallin names track back to an origin in Northumberland County Virginia and/or Dorchester County Maryland in the 1600s.So far I can see those families sorting out in three directions.Some, like my line, stayed in Virginia up into the late 1800s.Another, now very numerous, branch moved into Georgia, Alabama and points West.There was also movement into Kentucky and the middle middle-west that is a little harder to tie in.While we have not yet been able to put the final peg on it, all indications are that the "founders" for these families came from Ireland (perhaps via the West Indies).But that's not all.
In addition to Ireland, "Fallin", spelled that way, also appears as a surname in Sweden, Norway, France, and Russia.Hence my request for everybody to come in to see if we can help.
If you have any names from Illinois, or any place (County or Town) names, that will help a lot.
I've recently corresponded with the "history officer" in Stirling and received the same basic answer you did.Fallin (on the River Forth) was showing on maps as far back as the early 1800s but no one locally seems to know the origin.None of the usual spelling variations, Fallin, Fallon, Fallen, etc. are included in lists of Scots surnames.