Would this be a turn-off to a potential relationship?

A hard to spell last name is NOT a problem, if people cant spell thats their issue. Its not embarrassing to you or her. (Unless you are insecure, no offense...)

What IS unattractive/turn off, is:

1) a man with a fundamental lack of confidence (so you need to get confidence)

2) on the topic of names, if you had an unattractive last name like Hershberger, or Dung, etc (a name that sounded dirty, lame, weird etc) then that would be embarrassing. but not just a simply hard to spell or pronounce name.

some names are foreign, eastern european especially, we get it. its no big deal

Three cheers for the anonymous option here...

My maiden name is Ross. Doesn't get much easier than that, right? My husband's last name is one fine Italian hot mess - Sciacchitano. Hard to spell, hard for most people to pronounce, but I never batted an eye about taking it.

I really don't know anyone, out of literally thousands, who have married a name. Most people, if not all, marry another person and that person can be named Mud or Mudd, but that's irrelevant.

Because not everyone is as shallow as you believe them to be. Plus don't forget that now a days its common to keep your maiden name, or make things more complicated by hyphenating.

I didn't like my husband's last name, but I married him because I loved him more than I cared about his last name. Don't worry.

She isn't marrying the name, she's marrying you. I've seen many married women with bizarre last names, but obviously they didn't care. The are in love with the person, not necessarily the name, but they accept it.

If someone is as good as it gets, their last name shouldn't matter. If your last name is that outrageous, your future wife could always opt to keep her maiden name.

Change your name to John Wayne.

If someone doesn't marry you becasue of your last name then they are super shallow.

My last name is pronounced wrong so many times and it has never bothered me.

Literally. People pronounce it as: Cocain, Cock-in, Croch-in, And many many more...

No, not for most anyway.

Lack of confidence because of name might though.