The person about whom the first hit is about when a name is entered on Google. Theoretically, this person is the most famous person with that name. Ordinary people like you or me could be a Google Lord, if they have weird enough names.
Mr Smith is much more popular than Mr Ramasudopolous, but Mr R is much more likely to be a Google Lord
"To get to my blog you can just type my name and click I'm feeling lucky, I'm a Google Lord"