I know your message is old, but you may still get this. I've been looking into our last name and it looks like all the Seffens came here from Germany or England. The name's origin is goes back to Germany with most of the Seffens in England living in the south. There are Seffens in MI, MN, MO, KS, TX, FL, GA, AZ, OH, and CA that I know of here in the states.