Why two names?

Thank you. One more thing. I've gotta ask - is your name Mark Hutten or Mark Huttenlocker. Which one, and why two names?

That makes me a little nervous.

Thanks.

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Actually, my name is Mark Hutten-Locker, but this name seems to confuse everybody. So in an attempt to make my life a bit easier, I chop off the "Locker" part (except in those cases where my full name is needed, of course). Hope this isn't too confusing. Please just call me Mark Hutten. Thanks!

Mark Hutten