If you live in DeKalb County, home of Northern Illinois University, there is a strong chance your last name is Johnson, Miller or Johnson, but you will have to keep up with the Shroeders, Hansons, and the Frieders. The list is out of the most common last names of residents of DeKalb County...
If you live in Ogle County there is a real good chance your last name is Smith or Johnson. I know that's boring, but as you move down the list you'll find a lot of Stukenbergs, Ebens and Zillys. You'll also have to keep up with the Martins, The Reeds and the Thompson's. The list is out of the most common last names of residents of Ogle County.
Before you guess, some explanation of the question is in order. By "distinctive" last name, I mean those that occur most often compared to the nation as a whole. Got it? Okay, make your guess--but think "Swedish" while you're doing it.
If you live in Boone County there is a real good chance your last name is Anderson, Rodriguez or Johnson, but you will have to keep up with the Garcia's, the Browns and the Martinez's. The list is out of the most common last names of residents of Boone County.
Here in Winnebago County we don't keep up with the Kardashians, but we do keep up with the Cunninghams, Zimmermans, and Whiteheads. The list is out of the most common last names of residents of Winnebago County.