awry did this and it looked intresting so i gave it a go :)
Find out where your last name is most common

AUSTRALIA 27.96
NEW-ZEALAND 20.1
CANADA 9.17
FRANCE 7.4
UNITED KINGDOM 7.29

I thought it might be a little more common in the UK as that's where my family emmigrated from, but i guess they all buggered off elsewhere lol.