I once considered registering a domain name based on my forum name, but that was taken already. Other than that I haven't been very curious.
I haven't googled my real name for a while, but in the past I was surprised to see how visible my few Amazon reviews were.
I'm not aware of any homonym (same family name and given name) active on the web, but I used to get regular visits on my website for the keywords "artur artmatic". Artur is my last name, and Artmatic is a graphics software that I used a lot for a time, and therefore was heavily represented on my site. Obviously someone makes regular searches on these keywords, I wish I knew why
This has been going on for years, although the visits are less frequent now.