For most people, that'd be a loss. You'd lose your whole reputation. It sounds to me like your reputation is of negative value, given the Google problem.
Keep in mind also that Googling happens before interview, and background checks happen after a successful interview. So even if the name-change won't get you around a formal check (by some stable identifier like SSN) you can at least control the time of disclosure.
The ugly thing about being Googled is that you don't know when or if it happens. Name change gets you the interview and then, if you're pretty sure they'll find it in a more thorough check, you can disclose it on your terms.
Almost every member of my immediate family has casually done this at least once with no problem (it's kind of a family tradition it seems..). The name on my credit cards, the name I am known by professionally, and the name my parents know me by are all different. They share similar derivation yes, if you know one of them you probably would not bat an eye when another came up, but they are absolutely sufficiently different to isolate online reputations.
http://www.co.stearns.mn.us/Portals/0/docs/Document%20Librar... for instance for one of the hassels here
Thank you for your response. I will give non-disclosure a shot and see how that works. It feels inappropriate deceptive for me to omit those details when asked (via interview question in person, phone, or form) about them.