38.5% live in Minnesota
23.1% live in Montana
7.7% live in Pennsylvania, North Dakota, South Dakota and Oregon
If you don't like people
named olfert
you should probably move to
New Hampshire (None live there).
Fun fact: Montana
is the state with the most
last name olfert per capita.
Check out the popularity
of the last name olfert
for each state in the map below.