Preface of my question: We often read or hear that to refer to the work or some other aspect of great personalities "-ism", "-ian" etc is used at the end of their surnames, usually or else to their names. For example, word
"Keynesian" is often used to refer to the Economics of
John Maynard Keynes. An
"-ian" is added at the end of John Maynard Keynes's surname. Similarly, word Marx
ian for the one who believes in Karl Marx's thought, Buddh
ism for the believers in Buddhist and so on.
Now my questions: I've two important questions. Please answer both of them.
Firstly, what
"-ian", "-ism" would be grammatically correct to refer to the Economics of
Milton Friedman ? I have read his "suffix" somewhere but I don't recall it. So asking.
Secondly, you would noticed that in the whole post I've used "-ian", "-ism" etc instead of using any particular name for it. This is because I don't know what they are called; though I've used the word suffix at one place but I'm
not too sure about it. So please tell me what is the
correct particular name/s for "-ian", "-ism" etc and their usage
? Would be more glad if you
elaborate a bit on this
"-ian" , "-ism" thing
also and how they are used in English
?PS: And please do accept my apology if any inconvenience is caused to you by my a trifle lengthy post.

Kind Regards and Thanks