What nicknames did Cliff Montgomery go by?

There isn't enough information to determine if "Cliff Montgomery" is a real person and, if so, what nicknames he might have.

To help me figure this out, could you provide more context? For example:

* Is this a character from a book, movie, or TV show? If so, which one?

* Is this a real person? If so, what field is he known for?

* Do you have any other information about him?

With more details, I can help you find out his nicknames.