An image search on Google for 'bell' produces (can you guess?) a multitude of pictures of the type of bell that makes a pleasant ringing sound when one calls for afternoon tea, not to mention the more coarse cousins to be found in ships and belfreys.
A similar search on Live's search engine produces (can you guess?) an array of images of people with the name Bell.
Ask follows Google's bias whereas Yahoo does mix object and people, though the pictures of people are not, shall we say, quite what you might expect.
What is interesting about these differences is that there are obvious biases in the search engines in terms of how they disambiguate terms (is it an object or a person that the user intends to find?). However, none of the search engines really acknowledges the ambiguity, nor do they assist the user in dealing with it. Perhaps the best attempt here is in Ask's interactive query completion, however this is far from perfect as typing 'bell' precludes any suggestions that start with a term other than 'bell'. Thus someone with the surname 'bell' is not going to surface at this point in the interaction.