Article name 

 recently moved this article from Muhammad bin Nayef to Muhammad, Crown Prince of Saudi Arabia. This is in accordance with Wikipedia:Naming conventions (royalty and nobility), but there is ambiguity with Muhammad bin Abdulaziz Al Saud, a crown prince who resigned.

The other Saudi crown princes who never became king are named without title. This is in contrast to, for example, Arthur, Prince of Wales. Whatever is decided here should be applied to princes Sultan and Nayef, who both died as crown prince.

My opinion is that Muhammad bin Nayef is the most appropriate name, but I'd like to see a consensus before the article moves again. —aco