Check this out…. http://www.houseofnames.com/xq/asp.fc/qx…
If you are curious, go to http://worldconnect.genealogy.rootsweb.c… Enter “Hammer*” with the asterisk in the surname, and check “Omit blanks” next to birth place. There are 25,000 entries.
Norse / Scandanavian countries for sure; maybe Germany and others.