So-and-so and Unnamed

So-and-so noun - A person whose behavior is offensive to others.

Unnamed and so-and-so are semantically related. in obscure topic. In some cases you can use "Unnamed" instead an adjective phrase "So-and-so".

Unnamed adjective - Being or having an unknown or unnamed source.

So-and-so and unnamed are semantically related. Sometimes you can use "So-and-so" instead an adjective "Unnamed".