A useful Google gadget, called Google Trends, is illustrated in the following diagram. It shows the relative popularity of search terms 'Anand' and 'Kramnik'.
For an explanation of the spikes labelled A, B, C, etc., see the full page returned by Compare: anand, kramnik. This will also tell you that Anand's overall popularity is sourced in India. What percentage of searches on 'Anand' is for the chess player rather than other Anands? That is a good question that I can't answer.