Support A google Books search for Mohandas Karamchand Gandhi in quotes gets  results Mahatma Gandhi in quotes gets  results a different order of magnitude If Mahatma Ghandi were not in more common use then you would expect most if not all of the books found under Mahatma Gandhi also to contain Mohandas Karamchand Gandhi Apparently they dont All of the titles on the first page of the former search results do not have Mohandas Karamchand Gandhi in the title all but one of the titles in the first six pages of the latter have Mahatma Gandhi in the title Only three of the books on the first page of the former have a proper cover image all of the books in the first seven pages of the latter do That is some indication of the quality of the sources thrown up by the searches The assertion that Mahatma is not common use simply is not tenable The IMOS argument is a red herring IMOS is concerned with POV use of titles not with common use His Holiness Pope John Paul or Her Majesty Queen Elizabeth do not appear often in book titles