"Joe Doakes" is a colloquial term that is often used to refer to an average, ordinary, or unremarkable person. It's a catchphrase that is used to sum up the idea of a generic, anonymous person. Some other synonyms that can be used in place of "Joe Doakes" are "John Doe, Jane Doe" or "Mr. Smith". Other terms that could be used to describe an unremarkable or ordinary person could be "Everyman", "the average Joe or Jane", or "a run-of-the-mill person". The use of these synonyms is common and they are used in various contexts ranging from everyday conversations to legal documents and forms.