50.0% live in Wisconsin
20.0% live in Michigan
10.0% live in New York, Pennsylvania and Georgia
If you don't like people
called swanepoel
you should probably go to
New Hampshire (None live there).
Interesting fact: Wisconsin
is the state with the most
last name swanepoel per capita.
Check out the popularity
of the last name swanepoel
for each state in the map below.