Plenty of people have the same name, but if you call your child Brad Pitt, it will be interpreted as a reference to the famous guy bearing that name, and nobody will believe it is a coincidence.
Lynx doesn't have a large user base (I think) but it is installed by default on many linux distros. Having to install two programs with the same name is a pain which is only resolved by renaming one of them (at the distro or the user level).