12.1% live in Wisconsin
11.4% live in Illinois
7.1% live in Michigan, Nebraska and California
If you don't like people
with the name sonderegger
you should probably go to
New Hampshire (None live there).
Cool fact: Nebraska
is the state with the most
last name sonderegger per capita.
Check out the popularity
of the last name sonderegger
for each state in the map below.