It's quite amusing to see who else around the world has opted for the same 'username' as you
I don't think finding yourself on Google should be an issue most of the time, unless it makes you instantly identifiable to people you would rather not be identifiable to!
If that is the case, you can methodically go through all Google references to you, trace them back to their source, and remove yourself from that source. It won't always disappear instantly, but at very least will slip further and further down the pages in searches until it is as good as gone.
Sometimes it proves impossible to delete an entry (I had problems with LinkedIn at one time) but you can edit entries to make them useless. For instance, location as "Everywhere and Nowhere" or occupation as "A bit of this and a bit of that" It works!