I need help remembering theorists name in my A-Levels, do you have any tips?

Whenever I was faced with this in my studies, I used acronyms to help jar my memory. An acronym would be to use the first letter of each name and arrange it in an order which you could easily recall. For instance, with the names you listed here, it might be MRKKK. Since you have so many names to recall, break them down into groups of acronyms. Hope this helps you as well.