[curiouscats]

I think if people believe that anyone using names that have been used for hundreds and thousands of years are going to preempt everyone else from doing so (zen, book...) they should not have used those names in the first place. If you want to prohibit all derivations of your name the rule should become that you have to make up a completely new word. If you chose a commonly known word then don't expect to prohibit everyone else from doing so.